diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
index 710f7838d72f..99a66728ba25 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
@@ -2756,6 +2756,12 @@ protected void updateModelForComposedSchema(CodegenModel m, Schema schema, Map<S
 
         // interfaces (schemas defined in allOf, anyOf, oneOf)
         List<Schema> interfaces = ModelUtils.getInterfaces(composed);
+
+        // For anyOf/oneOf, required fields should be the intersection across members,
+        // not the union. A field is only guaranteed present if ALL members require it.
+        boolean isAnyOfOrOneOf = ModelUtils.hasAnyOf(composed) || ModelUtils.hasOneOf(composed);
+        List<Set<String>> perMemberRequiredSets = isAnyOfOrOneOf ? new ArrayList<>() : null;
+
         if (!interfaces.isEmpty()) {
             // m.interfaces is for backward compatibility
             if (m.interfaces == null)
@@ -2816,7 +2822,14 @@ protected void updateModelForComposedSchema(CodegenModel m, Schema schema, Map<S
                     } else {
                         // composition
                         Map<String, Schema> newProperties = new LinkedHashMap<>();
-                        addProperties(newProperties, required, refSchema, new HashSet<>());
+                        if (isAnyOfOrOneOf) {
+                            // Collect required fields per-member for later intersection
+                            List<String> memberRequired = new ArrayList<>();
+                            addProperties(newProperties, memberRequired, refSchema, new HashSet<>());
+                            perMemberRequiredSets.add(new HashSet<>(memberRequired));
+                        } else {
+                            addProperties(newProperties, required, refSchema, new HashSet<>());
+                        }
                         mergeProperties(properties, newProperties);
                         addProperties(allProperties, allRequired, refSchema, new HashSet<>());
                     }
@@ -2857,8 +2870,15 @@ protected void updateModelForComposedSchema(CodegenModel m, Schema schema, Map<S
         for (Schema component : interfaces) {
             if (component.get$ref() == null) {
                 if (component != null) {
-                    // component is the child schema
-                    addProperties(properties, required, component, new HashSet<>());
+                    if (isAnyOfOrOneOf) {
+                        // Collect required fields per-member for later intersection
+                        List<String> memberRequired = new ArrayList<>();
+                        addProperties(properties, memberRequired, component, new HashSet<>());
+                        perMemberRequiredSets.add(new HashSet<>(memberRequired));
+                    } else {
+                        // component is the child schema
+                        addProperties(properties, required, component, new HashSet<>());
+                    }
 
                     // includes child's properties (all, required) in allProperties, allRequired
                     addProperties(allProperties, allRequired, component, new HashSet<>());
@@ -2868,6 +2888,16 @@ protected void updateModelForComposedSchema(CodegenModel m, Schema schema, Map<S
             }
         }
 
+        // For anyOf/oneOf, compute the intersection of required fields across all members.
+        // A field is only required in the merged model if ALL members require it.
+        if (isAnyOfOrOneOf && !perMemberRequiredSets.isEmpty()) {
+            Set<String> intersected = new HashSet<>(perMemberRequiredSets.get(0));
+            for (int i = 1; i < perMemberRequiredSets.size(); i++) {
+                intersected.retainAll(perMemberRequiredSets.get(i));
+            }
+            required.addAll(intersected);
+        }
+
         if (composed.getRequired() != null) {
             required.addAll(composed.getRequired());
             allRequired.addAll(composed.getRequired());
diff --git a/modules/openapi-generator/src/test/java/org/openapitools/codegen/swift6/Swift6ClientCodegenModelTest.java b/modules/openapi-generator/src/test/java/org/openapitools/codegen/swift6/Swift6ClientCodegenModelTest.java
index 9de8e91b8caa..db9149d97a1b 100644
--- a/modules/openapi-generator/src/test/java/org/openapitools/codegen/swift6/Swift6ClientCodegenModelTest.java
+++ b/modules/openapi-generator/src/test/java/org/openapitools/codegen/swift6/Swift6ClientCodegenModelTest.java
@@ -25,9 +25,12 @@
 import org.openapitools.codegen.DefaultCodegen;
 import org.openapitools.codegen.TestUtils;
 import org.openapitools.codegen.languages.Swift6ClientCodegen;
+import org.openapitools.codegen.utils.ModelUtils;
 import org.testng.Assert;
 import org.testng.annotations.Test;
 
+import java.util.Map;
+
 @SuppressWarnings("static-method")
 public class Swift6ClientCodegenModelTest {
 
@@ -163,4 +166,74 @@ public void useCustomDateTimeTest() {
         Assert.assertFalse(property7.isContainer);
     }
 
+    @Test(description = "anyOf with different required fields should use intersection for required", enabled = true)
+    public void anyOfRequiredFieldsIntersectionTest() {
+        // VoteResponse requires: status, voteId
+        // APIError requires: status, reason, code
+        // Intersection: only "status" should be required in the merged model
+        final OpenAPI openAPI = TestUtils.parseFlattenSpec("src/test/resources/3_0/swift6_anyof_required.yaml");
+        final Swift6ClientCodegen codegen = new Swift6ClientCodegen();
+        codegen.setOpenAPI(openAPI);
+        codegen.processOpts();
+
+        // The inline model resolver creates a model for the anyOf response.
+        // Find the composed schema that merges VoteResponse and APIError.
+        Map<String, Schema> schemas = ModelUtils.getSchemas(openAPI);
+        Schema composedSchema = null;
+        String composedName = null;
+        for (Map.Entry<String, Schema> entry : schemas.entrySet()) {
+            Schema s = entry.getValue();
+            if (s.getAnyOf() != null && !s.getAnyOf().isEmpty()) {
+                composedSchema = s;
+                composedName = entry.getKey();
+                break;
+            }
+        }
+        Assert.assertNotNull(composedSchema, "Should find an anyOf composed schema");
+
+        final CodegenModel cm = codegen.fromModel(composedName, composedSchema);
+
+        // "status" is required in BOTH VoteResponse and APIError -> should be required
+        CodegenProperty statusProp = cm.vars.stream()
+                .filter(p -> p.baseName.equals("status"))
+                .findFirst().orElse(null);
+        Assert.assertNotNull(statusProp, "status property should exist");
+        Assert.assertTrue(statusProp.required, "status should be required (present in all anyOf members)");
+
+        // "voteId" is required only in VoteResponse, not in APIError -> should NOT be required
+        CodegenProperty voteIdProp = cm.vars.stream()
+                .filter(p -> p.baseName.equals("voteId"))
+                .findFirst().orElse(null);
+        Assert.assertNotNull(voteIdProp, "voteId property should exist");
+        Assert.assertFalse(voteIdProp.required, "voteId should NOT be required (only in VoteResponse, not APIError)");
+
+        // "reason" is required only in APIError, not in VoteResponse -> should NOT be required
+        CodegenProperty reasonProp = cm.vars.stream()
+                .filter(p -> p.baseName.equals("reason"))
+                .findFirst().orElse(null);
+        Assert.assertNotNull(reasonProp, "reason property should exist");
+        Assert.assertFalse(reasonProp.required, "reason should NOT be required (only in APIError, not VoteResponse)");
+
+        // "code" is required only in APIError, not in VoteResponse -> should NOT be required
+        CodegenProperty codeProp = cm.vars.stream()
+                .filter(p -> p.baseName.equals("code"))
+                .findFirst().orElse(null);
+        Assert.assertNotNull(codeProp, "code property should exist");
+        Assert.assertFalse(codeProp.required, "code should NOT be required (only in APIError, not VoteResponse)");
+
+        // "isVerified" is optional in VoteResponse, not in APIError -> should NOT be required
+        CodegenProperty isVerifiedProp = cm.vars.stream()
+                .filter(p -> p.baseName.equals("isVerified"))
+                .findFirst().orElse(null);
+        Assert.assertNotNull(isVerifiedProp, "isVerified property should exist");
+        Assert.assertFalse(isVerifiedProp.required, "isVerified should NOT be required");
+
+        // "secondaryCode" is optional in APIError -> should NOT be required
+        CodegenProperty secondaryCodeProp = cm.vars.stream()
+                .filter(p -> p.baseName.equals("secondaryCode"))
+                .findFirst().orElse(null);
+        Assert.assertNotNull(secondaryCodeProp, "secondaryCode property should exist");
+        Assert.assertFalse(secondaryCodeProp.required, "secondaryCode should NOT be required");
+    }
+
 }
diff --git a/modules/openapi-generator/src/test/resources/3_0/swift6_anyof_required.yaml b/modules/openapi-generator/src/test/resources/3_0/swift6_anyof_required.yaml
new file mode 100644
index 000000000000..3dabd6f8311f
--- /dev/null
+++ b/modules/openapi-generator/src/test/resources/3_0/swift6_anyof_required.yaml
@@ -0,0 +1,51 @@
+openapi: 3.0.0
+info:
+  title: anyOf Required Fields Test
+  version: 1.0.0
+paths:
+  /vote:
+    post:
+      operationId: voteOnItem
+      responses:
+        '200':
+          description: Success or error response
+          content:
+            application/json:
+              schema:
+                anyOf:
+                  - $ref: '#/components/schemas/VoteResponse'
+                  - $ref: '#/components/schemas/APIError'
+components:
+  schemas:
+    APIStatus:
+      type: string
+      enum:
+        - success
+        - failed
+    VoteResponse:
+      type: object
+      required:
+        - status
+        - voteId
+      properties:
+        status:
+          $ref: '#/components/schemas/APIStatus'
+        voteId:
+          type: string
+        isVerified:
+          type: boolean
+    APIError:
+      type: object
+      required:
+        - status
+        - reason
+        - code
+      properties:
+        status:
+          $ref: '#/components/schemas/APIStatus'
+        reason:
+          type: string
+        code:
+          type: string
+        secondaryCode:
+          type: string
diff --git a/samples/client/others/go/oneof-anyof-required/docs/Object.md b/samples/client/others/go/oneof-anyof-required/docs/Object.md
index 28dd77444cfd..e7bd53d08629 100644
--- a/samples/client/others/go/oneof-anyof-required/docs/Object.md
+++ b/samples/client/others/go/oneof-anyof-required/docs/Object.md
@@ -4,14 +4,14 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Field1** | **string** | Specifies an action name to be used with the Android Intent class. | 
-**Field2** | **string** | Specifies an action name to be used with the Android Intent class. | 
+**Field1** | Pointer to **string** | Specifies an action name to be used with the Android Intent class. | [optional] 
+**Field2** | Pointer to **string** | Specifies an action name to be used with the Android Intent class. | [optional] 
 
 ## Methods
 
 ### NewObject
 
-`func NewObject(field1 string, field2 string, ) *Object`
+`func NewObject() *Object`
 
 NewObject instantiates a new Object object
 This constructor will assign default values to properties that have it defined,
@@ -45,6 +45,11 @@ and a boolean to check if the value has been set.
 
 SetField1 sets Field1 field to given value.
 
+### HasField1
+
+`func (o *Object) HasField1() bool`
+
+HasField1 returns a boolean if a field has been set.
 
 ### GetField2
 
@@ -65,6 +70,11 @@ and a boolean to check if the value has been set.
 
 SetField2 sets Field2 field to given value.
 
+### HasField2
+
+`func (o *Object) HasField2() bool`
+
+HasField2 returns a boolean if a field has been set.
 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/others/go/oneof-anyof-required/docs/Object2.md b/samples/client/others/go/oneof-anyof-required/docs/Object2.md
index b9c9aee67281..ae813d763de2 100644
--- a/samples/client/others/go/oneof-anyof-required/docs/Object2.md
+++ b/samples/client/others/go/oneof-anyof-required/docs/Object2.md
@@ -4,14 +4,14 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Field1** | **string** | Specifies an action name to be used with the Android Intent class. | 
-**Field2** | **string** | Specifies an action name to be used with the Android Intent class. | 
+**Field1** | Pointer to **string** | Specifies an action name to be used with the Android Intent class. | [optional] 
+**Field2** | Pointer to **string** | Specifies an action name to be used with the Android Intent class. | [optional] 
 
 ## Methods
 
 ### NewObject2
 
-`func NewObject2(field1 string, field2 string, ) *Object2`
+`func NewObject2() *Object2`
 
 NewObject2 instantiates a new Object2 object
 This constructor will assign default values to properties that have it defined,
@@ -45,6 +45,11 @@ and a boolean to check if the value has been set.
 
 SetField1 sets Field1 field to given value.
 
+### HasField1
+
+`func (o *Object2) HasField1() bool`
+
+HasField1 returns a boolean if a field has been set.
 
 ### GetField2
 
@@ -65,6 +70,11 @@ and a boolean to check if the value has been set.
 
 SetField2 sets Field2 field to given value.
 
+### HasField2
+
+`func (o *Object2) HasField2() bool`
+
+HasField2 returns a boolean if a field has been set.
 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/others/go/oneof-discriminator-lookup/docs/Object.md b/samples/client/others/go/oneof-discriminator-lookup/docs/Object.md
index f4024d7e9fcc..0c91c17fee7e 100644
--- a/samples/client/others/go/oneof-discriminator-lookup/docs/Object.md
+++ b/samples/client/others/go/oneof-discriminator-lookup/docs/Object.md
@@ -4,14 +4,14 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Field1** | **string** | Specifies an action name to be used with the Android Intent class. | 
+**Field1** | Pointer to **string** | Specifies an action name to be used with the Android Intent class. | [optional] 
 **Type** | Pointer to **string** |  | [optional] 
 
 ## Methods
 
 ### NewObject
 
-`func NewObject(field1 string, ) *Object`
+`func NewObject() *Object`
 
 NewObject instantiates a new Object object
 This constructor will assign default values to properties that have it defined,
@@ -45,6 +45,11 @@ and a boolean to check if the value has been set.
 
 SetField1 sets Field1 field to given value.
 
+### HasField1
+
+`func (o *Object) HasField1() bool`
+
+HasField1 returns a boolean if a field has been set.
 
 ### GetType
 
diff --git a/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/AnyOfUserOrPet.md b/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/AnyOfUserOrPet.md
index bfa4bc532462..94fb7d7829d0 100644
--- a/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/AnyOfUserOrPet.md
+++ b/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/AnyOfUserOrPet.md
@@ -5,8 +5,8 @@
 | Name | Type | Description | Notes |
 | ------------ | ------------- | ------------- | ------------- |
 | **id** | **kotlin.Long** |  |  |
-| **username** | **kotlin.String** |  |  |
-| **name** | **kotlin.String** |  |  |
+| **username** | **kotlin.String** |  |  [optional] |
+| **name** | **kotlin.String** |  |  [optional] |
 
 
 
diff --git a/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/AnyOfUserOrPetOrArrayString.md b/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/AnyOfUserOrPetOrArrayString.md
index fa7a5106fa49..064cd63ef0bf 100644
--- a/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/AnyOfUserOrPetOrArrayString.md
+++ b/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/AnyOfUserOrPetOrArrayString.md
@@ -4,9 +4,9 @@
 ## Properties
 | Name | Type | Description | Notes |
 | ------------ | ------------- | ------------- | ------------- |
-| **id** | **kotlin.Long** |  |  |
-| **username** | **kotlin.String** |  |  |
-| **name** | **kotlin.String** |  |  |
+| **id** | **kotlin.Long** |  |  [optional] |
+| **username** | **kotlin.String** |  |  [optional] |
+| **name** | **kotlin.String** |  |  [optional] |
 
 
 
diff --git a/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/UserOrPet.md b/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/UserOrPet.md
index 1cfb30b0d0a9..e8bd47c7f79e 100644
--- a/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/UserOrPet.md
+++ b/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/UserOrPet.md
@@ -5,8 +5,8 @@
 | Name | Type | Description | Notes |
 | ------------ | ------------- | ------------- | ------------- |
 | **id** | **kotlin.Long** |  |  |
-| **username** | **kotlin.String** |  |  |
-| **name** | **kotlin.String** |  |  |
+| **username** | **kotlin.String** |  |  [optional] |
+| **name** | **kotlin.String** |  |  [optional] |
 
 
 
diff --git a/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/UserOrPetOrArrayString.md b/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/UserOrPetOrArrayString.md
index 667f64035f8f..cd2caf4aac68 100644
--- a/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/UserOrPetOrArrayString.md
+++ b/samples/client/others/kotlin-oneOf-anyOf-kotlinx-serialization/docs/UserOrPetOrArrayString.md
@@ -4,9 +4,9 @@
 ## Properties
 | Name | Type | Description | Notes |
 | ------------ | ------------- | ------------- | ------------- |
-| **id** | **kotlin.Long** |  |  |
-| **username** | **kotlin.String** |  |  |
-| **name** | **kotlin.String** |  |  |
+| **id** | **kotlin.Long** |  |  [optional] |
+| **username** | **kotlin.String** |  |  [optional] |
+| **name** | **kotlin.String** |  |  [optional] |
 
 
 
diff --git a/samples/client/others/terraform/oneof-anyof-required/internal/client/model_object.go b/samples/client/others/terraform/oneof-anyof-required/internal/client/model_object.go
index 0aebcc2d28c0..7ef030e63cd3 100644
--- a/samples/client/others/terraform/oneof-anyof-required/internal/client/model_object.go
+++ b/samples/client/others/terraform/oneof-anyof-required/internal/client/model_object.go
@@ -4,6 +4,6 @@ package client
 
 // Object - Object struct
 type Object struct {
-	Field1 string `json:"field1"`
-	Field2 string `json:"field2"`
+	Field1 string `json:"field1,omitempty"`
+	Field2 string `json:"field2,omitempty"`
 }
diff --git a/samples/client/others/terraform/oneof-anyof-required/internal/client/model_object2.go b/samples/client/others/terraform/oneof-anyof-required/internal/client/model_object2.go
index 85f4c85784a9..4ded2034ef26 100644
--- a/samples/client/others/terraform/oneof-anyof-required/internal/client/model_object2.go
+++ b/samples/client/others/terraform/oneof-anyof-required/internal/client/model_object2.go
@@ -4,6 +4,6 @@ package client
 
 // Object2 - Object2 struct
 type Object2 struct {
-	Field1 string `json:"field1"`
-	Field2 string `json:"field2"`
+	Field1 string `json:"field1,omitempty"`
+	Field2 string `json:"field2,omitempty"`
 }
diff --git a/samples/client/others/terraform/oneof-discriminator-lookup/internal/client/model_object.go b/samples/client/others/terraform/oneof-discriminator-lookup/internal/client/model_object.go
index 7a5614cb5c49..b786ab8b80d5 100644
--- a/samples/client/others/terraform/oneof-discriminator-lookup/internal/client/model_object.go
+++ b/samples/client/others/terraform/oneof-discriminator-lookup/internal/client/model_object.go
@@ -4,6 +4,6 @@ package client
 
 // Object - Object struct
 type Object struct {
-	Field1 string `json:"field1"`
+	Field1 string `json:"field1,omitempty"`
 	Type string `json:"type,omitempty"`
 }
diff --git a/samples/client/petstore/R-httr2-wrapper/docs/AnyOfPig.md b/samples/client/petstore/R-httr2-wrapper/docs/AnyOfPig.md
index 296d7c7e334f..ff4cc616f8e9 100644
--- a/samples/client/petstore/R-httr2-wrapper/docs/AnyOfPig.md
+++ b/samples/client/petstore/R-httr2-wrapper/docs/AnyOfPig.md
@@ -5,7 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **className** | **character** |  | 
-**color** | **character** |  | 
-**size** | **integer** |  | 
+**color** | **character** |  | [optional] 
+**size** | **integer** |  | [optional] 
 
 
diff --git a/samples/client/petstore/R-httr2-wrapper/docs/Pig.md b/samples/client/petstore/R-httr2-wrapper/docs/Pig.md
index 7906011bd424..4096ec92c655 100644
--- a/samples/client/petstore/R-httr2-wrapper/docs/Pig.md
+++ b/samples/client/petstore/R-httr2-wrapper/docs/Pig.md
@@ -5,7 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **className** | **character** |  | 
-**color** | **character** |  | 
-**size** | **integer** |  | 
+**color** | **character** |  | [optional] 
+**size** | **integer** |  | [optional] 
 
 
diff --git a/samples/client/petstore/R-httr2/docs/AnyOfPig.md b/samples/client/petstore/R-httr2/docs/AnyOfPig.md
index 296d7c7e334f..ff4cc616f8e9 100644
--- a/samples/client/petstore/R-httr2/docs/AnyOfPig.md
+++ b/samples/client/petstore/R-httr2/docs/AnyOfPig.md
@@ -5,7 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **className** | **character** |  | 
-**color** | **character** |  | 
-**size** | **integer** |  | 
+**color** | **character** |  | [optional] 
+**size** | **integer** |  | [optional] 
 
 
diff --git a/samples/client/petstore/R-httr2/docs/Pig.md b/samples/client/petstore/R-httr2/docs/Pig.md
index 7906011bd424..4096ec92c655 100644
--- a/samples/client/petstore/R-httr2/docs/Pig.md
+++ b/samples/client/petstore/R-httr2/docs/Pig.md
@@ -5,7 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **className** | **character** |  | 
-**color** | **character** |  | 
-**size** | **integer** |  | 
+**color** | **character** |  | [optional] 
+**size** | **integer** |  | [optional] 
 
 
diff --git a/samples/client/petstore/R/docs/AnyOfPig.md b/samples/client/petstore/R/docs/AnyOfPig.md
index 296d7c7e334f..ff4cc616f8e9 100644
--- a/samples/client/petstore/R/docs/AnyOfPig.md
+++ b/samples/client/petstore/R/docs/AnyOfPig.md
@@ -5,7 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **className** | **character** |  | 
-**color** | **character** |  | 
-**size** | **integer** |  | 
+**color** | **character** |  | [optional] 
+**size** | **integer** |  | [optional] 
 
 
diff --git a/samples/client/petstore/R/docs/Pig.md b/samples/client/petstore/R/docs/Pig.md
index 7906011bd424..4096ec92c655 100644
--- a/samples/client/petstore/R/docs/Pig.md
+++ b/samples/client/petstore/R/docs/Pig.md
@@ -5,7 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **className** | **character** |  | 
-**color** | **character** |  | 
-**size** | **integer** |  | 
+**color** | **character** |  | [optional] 
+**size** | **integer** |  | [optional] 
 
 
diff --git a/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/FruitReq.md b/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/NullableShape.md b/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/Shape.md b/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/Shape.md
+++ b/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/ShapeOrNull.md b/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/httpclient/net10/Petstore/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/FruitReq.md b/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/NullableShape.md b/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/Shape.md b/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/Shape.md
+++ b/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/ShapeOrNull.md b/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/httpclient/net9/Petstore/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/FruitReq.md b/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/NullableShape.md b/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/Shape.md b/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/Shape.md
+++ b/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/ShapeOrNull.md b/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/httpclient/standard2.0/Petstore/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/FruitReq.md b/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/NullableShape.md b/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/Shape.md b/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/Shape.md
+++ b/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/ShapeOrNull.md b/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/restsharp/net10/Petstore/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/FruitReq.md b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/NullableShape.md b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/Shape.md b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/Shape.md
+++ b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/ShapeOrNull.md b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/FruitReq.md b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/NullableShape.md b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/Shape.md b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/Shape.md
+++ b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/ShapeOrNull.md b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/FruitReq.md b/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/NullableShape.md b/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/Shape.md b/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/Shape.md
+++ b/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/ShapeOrNull.md b/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/restsharp/net8/EnumMappings/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/FruitReq.md b/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/NullableShape.md b/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/Shape.md b/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/Shape.md
+++ b/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/ShapeOrNull.md b/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/restsharp/net8/Petstore/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/FruitReq.md b/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/NullableShape.md b/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/Shape.md b/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/Shape.md
+++ b/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/ShapeOrNull.md b/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/restsharp/net9/EnumMappings/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/FruitReq.md b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/NullableShape.md b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/Shape.md b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/Shape.md
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/ShapeOrNull.md b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/FruitReq.md b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/NullableShape.md b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/Shape.md b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/Shape.md
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/ShapeOrNull.md b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/FruitReq.md b/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/NullableShape.md b/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/Shape.md b/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/Shape.md
+++ b/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/ShapeOrNull.md b/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/unityWebRequest/net10/Petstore/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/FruitReq.md b/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/NullableShape.md b/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/Shape.md b/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/Shape.md
+++ b/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/ShapeOrNull.md b/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/unityWebRequest/net9/Petstore/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/FruitReq.md b/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/FruitReq.md
index 5db6b0e2d1d8..0e4fd9794616 100644
--- a/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/FruitReq.md
+++ b/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/FruitReq.md
@@ -4,9 +4,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | **string** |  | [optional] 
 **Mealy** | **bool** |  | [optional] 
-**LengthCm** | **decimal** |  | 
+**LengthCm** | **decimal** |  | [optional] 
 **Sweet** | **bool** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
diff --git a/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/NullableShape.md b/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/NullableShape.md
index 2656339e9d36..6f25f88f4d9a 100644
--- a/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/NullableShape.md
+++ b/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/NullableShape.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/Shape.md b/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/Shape.md
index ced6864c4438..d9ca57d3b4ec 100644
--- a/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/Shape.md
+++ b/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/Shape.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/ShapeOrNull.md b/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/ShapeOrNull.md
index ba986aa32e5c..f093ea16e1bf 100644
--- a/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/ShapeOrNull.md
+++ b/samples/client/petstore/csharp/unityWebRequest/standard2.0/Petstore/docs/ShapeOrNull.md
@@ -6,8 +6,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **string** |  | 
-**TriangleType** | **string** |  | 
-**QuadrilateralType** | **string** |  | 
+**TriangleType** | **string** |  | [optional] 
+**QuadrilateralType** | **string** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/client/petstore/java/okhttp-gson/docs/AllOfModelArrayAnyOfAllOfAttributesC.md b/samples/client/petstore/java/okhttp-gson/docs/AllOfModelArrayAnyOfAllOfAttributesC.md
index 5229de89b299..9fb0d2c5de7a 100644
--- a/samples/client/petstore/java/okhttp-gson/docs/AllOfModelArrayAnyOfAllOfAttributesC.md
+++ b/samples/client/petstore/java/okhttp-gson/docs/AllOfModelArrayAnyOfAllOfAttributesC.md
@@ -9,8 +9,8 @@
 |------------ | ------------- | ------------- | -------------|
 |**id** | **Long** |  |  [optional] |
 |**category** | [**Category**](Category.md) |  |  [optional] |
-|**name** | **String** |  |  |
-|**photoUrls** | **List&lt;String&gt;** |  |  |
+|**name** | **String** |  |  [optional] |
+|**photoUrls** | **List&lt;String&gt;** |  |  [optional] |
 |**tags** | [**List&lt;Tag&gt;**](Tag.md) |  |  [optional] |
 |**status** | [**StatusEnum**](#StatusEnum) | Order Status |  [optional] |
 |**petId** | **Long** |  |  [optional] |
diff --git a/samples/client/petstore/java/okhttp-gson/docs/FruitReq.md b/samples/client/petstore/java/okhttp-gson/docs/FruitReq.md
index 859a881b53ec..6e93d3650574 100644
--- a/samples/client/petstore/java/okhttp-gson/docs/FruitReq.md
+++ b/samples/client/petstore/java/okhttp-gson/docs/FruitReq.md
@@ -7,9 +7,9 @@
 
 | Name | Type | Description | Notes |
 |------------ | ------------- | ------------- | -------------|
-|**cultivar** | **String** |  |  |
+|**cultivar** | **String** |  |  [optional] |
 |**mealy** | **Boolean** |  |  [optional] |
-|**lengthCm** | **BigDecimal** |  |  |
+|**lengthCm** | **BigDecimal** |  |  [optional] |
 |**sweet** | **Boolean** |  |  [optional] |
 
 
diff --git a/samples/client/petstore/java/okhttp-gson/docs/NullableShape.md b/samples/client/petstore/java/okhttp-gson/docs/NullableShape.md
index 9d40680fd2c2..8c5dfe09a9ef 100644
--- a/samples/client/petstore/java/okhttp-gson/docs/NullableShape.md
+++ b/samples/client/petstore/java/okhttp-gson/docs/NullableShape.md
@@ -9,8 +9,8 @@ The value may be a shape or the 'null' value. The 'nullable' attribute was intro
 | Name | Type | Description | Notes |
 |------------ | ------------- | ------------- | -------------|
 |**shapeType** | **String** |  |  |
-|**triangleType** | **String** |  |  |
-|**quadrilateralType** | **String** |  |  |
+|**triangleType** | **String** |  |  [optional] |
+|**quadrilateralType** | **String** |  |  [optional] |
 
 
 
diff --git a/samples/client/petstore/java/okhttp-gson/docs/Shape.md b/samples/client/petstore/java/okhttp-gson/docs/Shape.md
index 51549d7b67f9..fc698a77a3fb 100644
--- a/samples/client/petstore/java/okhttp-gson/docs/Shape.md
+++ b/samples/client/petstore/java/okhttp-gson/docs/Shape.md
@@ -8,8 +8,8 @@
 | Name | Type | Description | Notes |
 |------------ | ------------- | ------------- | -------------|
 |**shapeType** | **String** |  |  |
-|**triangleType** | **String** |  |  |
-|**quadrilateralType** | **String** |  |  |
+|**triangleType** | **String** |  |  [optional] |
+|**quadrilateralType** | **String** |  |  [optional] |
 
 
 
diff --git a/samples/client/petstore/java/okhttp-gson/docs/ShapeOrNull.md b/samples/client/petstore/java/okhttp-gson/docs/ShapeOrNull.md
index c4ae8f1b6720..79053f0a521b 100644
--- a/samples/client/petstore/java/okhttp-gson/docs/ShapeOrNull.md
+++ b/samples/client/petstore/java/okhttp-gson/docs/ShapeOrNull.md
@@ -9,8 +9,8 @@ The value may be a shape or the 'null' value. This is introduced in OAS schema >
 | Name | Type | Description | Notes |
 |------------ | ------------- | ------------- | -------------|
 |**shapeType** | **String** |  |  |
-|**triangleType** | **String** |  |  |
-|**quadrilateralType** | **String** |  |  |
+|**triangleType** | **String** |  |  [optional] |
+|**quadrilateralType** | **String** |  |  [optional] |
 
 
 
diff --git a/samples/client/petstore/javascript-apollo/docs/Pig.md b/samples/client/petstore/javascript-apollo/docs/Pig.md
index a94e1687cc57..e999ac7be9b5 100644
--- a/samples/client/petstore/javascript-apollo/docs/Pig.md
+++ b/samples/client/petstore/javascript-apollo/docs/Pig.md
@@ -5,7 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **className** | **String** |  | 
-**color** | **String** |  | 
-**size** | **Number** |  | 
+**color** | **String** |  | [optional] 
+**size** | **Number** |  | [optional] 
 
 
diff --git a/samples/client/petstore/javascript-es6/docs/Pig.md b/samples/client/petstore/javascript-es6/docs/Pig.md
index a94e1687cc57..e999ac7be9b5 100644
--- a/samples/client/petstore/javascript-es6/docs/Pig.md
+++ b/samples/client/petstore/javascript-es6/docs/Pig.md
@@ -5,7 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **className** | **String** |  | 
-**color** | **String** |  | 
-**size** | **Number** |  | 
+**color** | **String** |  | [optional] 
+**size** | **Number** |  | [optional] 
 
 
diff --git a/samples/client/petstore/javascript-promise-es6/docs/Pig.md b/samples/client/petstore/javascript-promise-es6/docs/Pig.md
index a94e1687cc57..e999ac7be9b5 100644
--- a/samples/client/petstore/javascript-promise-es6/docs/Pig.md
+++ b/samples/client/petstore/javascript-promise-es6/docs/Pig.md
@@ -5,7 +5,7 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **className** | **String** |  | 
-**color** | **String** |  | 
-**size** | **Number** |  | 
+**color** | **String** |  | [optional] 
+**size** | **Number** |  | [optional] 
 
 
diff --git a/samples/client/petstore/kotlin-jvm-ktor-gson/docs/AnyOfUserOrPet.md b/samples/client/petstore/kotlin-jvm-ktor-gson/docs/AnyOfUserOrPet.md
index dccdda0a1f39..6c3727a9b393 100644
--- a/samples/client/petstore/kotlin-jvm-ktor-gson/docs/AnyOfUserOrPet.md
+++ b/samples/client/petstore/kotlin-jvm-ktor-gson/docs/AnyOfUserOrPet.md
@@ -4,10 +4,8 @@
 ## Properties
 | Name | Type | Description | Notes |
 | ------------ | ------------- | ------------- | ------------- |
-| **username** | **kotlin.String** |  |  |
-| **name** | **kotlin.String** |  |  |
-| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  |
 | **id** | **kotlin.Long** |  |  [optional] |
+| **username** | **kotlin.String** |  |  [optional] |
 | **firstName** | **kotlin.String** |  |  [optional] |
 | **lastName** | **kotlin.String** |  |  [optional] |
 | **email** | **kotlin.String** |  |  [optional] |
@@ -15,6 +13,8 @@
 | **phone** | **kotlin.String** |  |  [optional] |
 | **userStatus** | **kotlin.Int** | User Status |  [optional] |
 | **category** | [**Category**](Category.md) |  |  [optional] |
+| **name** | **kotlin.String** |  |  [optional] |
+| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  [optional] |
 | **tags** | [**kotlin.collections.List&lt;Tag&gt;**](Tag.md) |  |  [optional] |
 | **status** | [**inline**](#Status) | pet status in the store |  [optional] |
 
diff --git a/samples/client/petstore/kotlin-jvm-ktor-gson/docs/AnyOfUserOrPetOrArrayString.md b/samples/client/petstore/kotlin-jvm-ktor-gson/docs/AnyOfUserOrPetOrArrayString.md
index 7f2bee6c6212..5641b1e063cd 100644
--- a/samples/client/petstore/kotlin-jvm-ktor-gson/docs/AnyOfUserOrPetOrArrayString.md
+++ b/samples/client/petstore/kotlin-jvm-ktor-gson/docs/AnyOfUserOrPetOrArrayString.md
@@ -4,10 +4,8 @@
 ## Properties
 | Name | Type | Description | Notes |
 | ------------ | ------------- | ------------- | ------------- |
-| **username** | **kotlin.String** |  |  |
-| **name** | **kotlin.String** |  |  |
-| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  |
 | **id** | **kotlin.Long** |  |  [optional] |
+| **username** | **kotlin.String** |  |  [optional] |
 | **firstName** | **kotlin.String** |  |  [optional] |
 | **lastName** | **kotlin.String** |  |  [optional] |
 | **email** | **kotlin.String** |  |  [optional] |
@@ -15,6 +13,8 @@
 | **phone** | **kotlin.String** |  |  [optional] |
 | **userStatus** | **kotlin.Int** | User Status |  [optional] |
 | **category** | [**Category**](Category.md) |  |  [optional] |
+| **name** | **kotlin.String** |  |  [optional] |
+| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  [optional] |
 | **tags** | [**kotlin.collections.List&lt;Tag&gt;**](Tag.md) |  |  [optional] |
 | **status** | [**inline**](#Status) | pet status in the store |  [optional] |
 
diff --git a/samples/client/petstore/kotlin-jvm-ktor-gson/docs/UserOrPet.md b/samples/client/petstore/kotlin-jvm-ktor-gson/docs/UserOrPet.md
index 5412def1feab..0d2f22fbc753 100644
--- a/samples/client/petstore/kotlin-jvm-ktor-gson/docs/UserOrPet.md
+++ b/samples/client/petstore/kotlin-jvm-ktor-gson/docs/UserOrPet.md
@@ -4,10 +4,8 @@
 ## Properties
 | Name | Type | Description | Notes |
 | ------------ | ------------- | ------------- | ------------- |
-| **username** | **kotlin.String** |  |  |
-| **name** | **kotlin.String** |  |  |
-| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  |
 | **id** | **kotlin.Long** |  |  [optional] |
+| **username** | **kotlin.String** |  |  [optional] |
 | **firstName** | **kotlin.String** |  |  [optional] |
 | **lastName** | **kotlin.String** |  |  [optional] |
 | **email** | **kotlin.String** |  |  [optional] |
@@ -15,6 +13,8 @@
 | **phone** | **kotlin.String** |  |  [optional] |
 | **userStatus** | **kotlin.Int** | User Status |  [optional] |
 | **category** | [**Category**](Category.md) |  |  [optional] |
+| **name** | **kotlin.String** |  |  [optional] |
+| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  [optional] |
 | **tags** | [**kotlin.collections.List&lt;Tag&gt;**](Tag.md) |  |  [optional] |
 | **status** | [**inline**](#Status) | pet status in the store |  [optional] |
 
diff --git a/samples/client/petstore/kotlin-jvm-ktor-gson/docs/UserOrPetOrArrayString.md b/samples/client/petstore/kotlin-jvm-ktor-gson/docs/UserOrPetOrArrayString.md
index 97281e826daf..657a11c73bc5 100644
--- a/samples/client/petstore/kotlin-jvm-ktor-gson/docs/UserOrPetOrArrayString.md
+++ b/samples/client/petstore/kotlin-jvm-ktor-gson/docs/UserOrPetOrArrayString.md
@@ -4,10 +4,8 @@
 ## Properties
 | Name | Type | Description | Notes |
 | ------------ | ------------- | ------------- | ------------- |
-| **username** | **kotlin.String** |  |  |
-| **name** | **kotlin.String** |  |  |
-| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  |
 | **id** | **kotlin.Long** |  |  [optional] |
+| **username** | **kotlin.String** |  |  [optional] |
 | **firstName** | **kotlin.String** |  |  [optional] |
 | **lastName** | **kotlin.String** |  |  [optional] |
 | **email** | **kotlin.String** |  |  [optional] |
@@ -15,6 +13,8 @@
 | **phone** | **kotlin.String** |  |  [optional] |
 | **userStatus** | **kotlin.Int** | User Status |  [optional] |
 | **category** | [**Category**](Category.md) |  |  [optional] |
+| **name** | **kotlin.String** |  |  [optional] |
+| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  [optional] |
 | **tags** | [**kotlin.collections.List&lt;Tag&gt;**](Tag.md) |  |  [optional] |
 | **status** | [**inline**](#Status) | pet status in the store |  [optional] |
 
diff --git a/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/AnyOfUserOrPet.kt b/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/AnyOfUserOrPet.kt
index b7311711be0e..6f3c34d299c8 100644
--- a/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/AnyOfUserOrPet.kt
+++ b/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/AnyOfUserOrPet.kt
@@ -33,10 +33,8 @@ import com.google.gson.annotations.SerializedName
 /**
  * 
  *
- * @param username 
- * @param name 
- * @param photoUrls 
  * @param id 
+ * @param username 
  * @param firstName 
  * @param lastName 
  * @param email 
@@ -44,6 +42,8 @@ import com.google.gson.annotations.SerializedName
  * @param phone 
  * @param userStatus User Status
  * @param category 
+ * @param name 
+ * @param photoUrls 
  * @param tags 
  * @param status pet status in the store
  */
@@ -51,18 +51,12 @@ import com.google.gson.annotations.SerializedName
 
 data class AnyOfUserOrPet (
 
-    @SerializedName("username")
-    val username: kotlin.String,
-
-    @SerializedName("name")
-    val name: kotlin.String,
-
-    @SerializedName("photoUrls")
-    val photoUrls: kotlin.collections.List<kotlin.String>,
-
     @SerializedName("id")
     val id: kotlin.Long? = null,
 
+    @SerializedName("username")
+    val username: kotlin.String? = null,
+
     @SerializedName("firstName")
     val firstName: kotlin.String? = null,
 
@@ -85,6 +79,12 @@ data class AnyOfUserOrPet (
     @SerializedName("category")
     val category: Category? = null,
 
+    @SerializedName("name")
+    val name: kotlin.String? = null,
+
+    @SerializedName("photoUrls")
+    val photoUrls: kotlin.collections.List<kotlin.String>? = null,
+
     @SerializedName("tags")
     val tags: kotlin.collections.List<Tag>? = null,
 
diff --git a/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/AnyOfUserOrPetOrArrayString.kt b/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/AnyOfUserOrPetOrArrayString.kt
index 41bf279ba793..bded279d2698 100644
--- a/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/AnyOfUserOrPetOrArrayString.kt
+++ b/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/AnyOfUserOrPetOrArrayString.kt
@@ -33,10 +33,8 @@ import com.google.gson.annotations.SerializedName
 /**
  * 
  *
- * @param username 
- * @param name 
- * @param photoUrls 
  * @param id 
+ * @param username 
  * @param firstName 
  * @param lastName 
  * @param email 
@@ -44,6 +42,8 @@ import com.google.gson.annotations.SerializedName
  * @param phone 
  * @param userStatus User Status
  * @param category 
+ * @param name 
+ * @param photoUrls 
  * @param tags 
  * @param status pet status in the store
  */
@@ -51,18 +51,12 @@ import com.google.gson.annotations.SerializedName
 
 data class AnyOfUserOrPetOrArrayString (
 
-    @SerializedName("username")
-    val username: kotlin.String,
-
-    @SerializedName("name")
-    val name: kotlin.String,
-
-    @SerializedName("photoUrls")
-    val photoUrls: kotlin.collections.List<kotlin.String>,
-
     @SerializedName("id")
     val id: kotlin.Long? = null,
 
+    @SerializedName("username")
+    val username: kotlin.String? = null,
+
     @SerializedName("firstName")
     val firstName: kotlin.String? = null,
 
@@ -85,6 +79,12 @@ data class AnyOfUserOrPetOrArrayString (
     @SerializedName("category")
     val category: Category? = null,
 
+    @SerializedName("name")
+    val name: kotlin.String? = null,
+
+    @SerializedName("photoUrls")
+    val photoUrls: kotlin.collections.List<kotlin.String>? = null,
+
     @SerializedName("tags")
     val tags: kotlin.collections.List<Tag>? = null,
 
diff --git a/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/UserOrPet.kt b/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/UserOrPet.kt
index b2e1c8016f22..5575985a223b 100644
--- a/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/UserOrPet.kt
+++ b/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/UserOrPet.kt
@@ -33,10 +33,8 @@ import com.google.gson.annotations.SerializedName
 /**
  * A schema that can be either a User or a Pet
  *
- * @param username 
- * @param name 
- * @param photoUrls 
  * @param id 
+ * @param username 
  * @param firstName 
  * @param lastName 
  * @param email 
@@ -44,6 +42,8 @@ import com.google.gson.annotations.SerializedName
  * @param phone 
  * @param userStatus User Status
  * @param category 
+ * @param name 
+ * @param photoUrls 
  * @param tags 
  * @param status pet status in the store
  */
@@ -51,18 +51,12 @@ import com.google.gson.annotations.SerializedName
 
 data class UserOrPet (
 
-    @SerializedName("username")
-    val username: kotlin.String,
-
-    @SerializedName("name")
-    val name: kotlin.String,
-
-    @SerializedName("photoUrls")
-    val photoUrls: kotlin.collections.List<kotlin.String>,
-
     @SerializedName("id")
     val id: kotlin.Long? = null,
 
+    @SerializedName("username")
+    val username: kotlin.String? = null,
+
     @SerializedName("firstName")
     val firstName: kotlin.String? = null,
 
@@ -85,6 +79,12 @@ data class UserOrPet (
     @SerializedName("category")
     val category: Category? = null,
 
+    @SerializedName("name")
+    val name: kotlin.String? = null,
+
+    @SerializedName("photoUrls")
+    val photoUrls: kotlin.collections.List<kotlin.String>? = null,
+
     @SerializedName("tags")
     val tags: kotlin.collections.List<Tag>? = null,
 
diff --git a/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/UserOrPetOrArrayString.kt b/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/UserOrPetOrArrayString.kt
index 2cb265f3caa2..f505e6bd6a99 100644
--- a/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/UserOrPetOrArrayString.kt
+++ b/samples/client/petstore/kotlin-jvm-ktor-gson/src/main/kotlin/org/openapitools/client/models/UserOrPetOrArrayString.kt
@@ -33,10 +33,8 @@ import com.google.gson.annotations.SerializedName
 /**
  * A schema that can be either a User, a Pet, or an array of strings
  *
- * @param username 
- * @param name 
- * @param photoUrls 
  * @param id 
+ * @param username 
  * @param firstName 
  * @param lastName 
  * @param email 
@@ -44,6 +42,8 @@ import com.google.gson.annotations.SerializedName
  * @param phone 
  * @param userStatus User Status
  * @param category 
+ * @param name 
+ * @param photoUrls 
  * @param tags 
  * @param status pet status in the store
  */
@@ -51,18 +51,12 @@ import com.google.gson.annotations.SerializedName
 
 data class UserOrPetOrArrayString (
 
-    @SerializedName("username")
-    val username: kotlin.String,
-
-    @SerializedName("name")
-    val name: kotlin.String,
-
-    @SerializedName("photoUrls")
-    val photoUrls: kotlin.collections.List<kotlin.String>,
-
     @SerializedName("id")
     val id: kotlin.Long? = null,
 
+    @SerializedName("username")
+    val username: kotlin.String? = null,
+
     @SerializedName("firstName")
     val firstName: kotlin.String? = null,
 
@@ -85,6 +79,12 @@ data class UserOrPetOrArrayString (
     @SerializedName("category")
     val category: Category? = null,
 
+    @SerializedName("name")
+    val name: kotlin.String? = null,
+
+    @SerializedName("photoUrls")
+    val photoUrls: kotlin.collections.List<kotlin.String>? = null,
+
     @SerializedName("tags")
     val tags: kotlin.collections.List<Tag>? = null,
 
diff --git a/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/AnyOfUserOrPet.md b/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/AnyOfUserOrPet.md
index fe24e24f47cb..9d3f3e958ebe 100644
--- a/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/AnyOfUserOrPet.md
+++ b/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/AnyOfUserOrPet.md
@@ -4,10 +4,8 @@
 ## Properties
 | Name | Type | Description | Notes |
 | ------------ | ------------- | ------------- | ------------- |
-| **username** | **kotlin.String** |  |  |
-| **name** | **kotlin.String** |  |  |
-| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  |
 | **id** | **kotlin.Long** |  |  [optional] |
+| **username** | **kotlin.String** |  |  [optional] |
 | **firstName** | **kotlin.String** |  |  [optional] |
 | **lastName** | **kotlin.String** |  |  [optional] |
 | **email** | **kotlin.String** |  |  [optional] |
@@ -15,6 +13,8 @@
 | **phone** | **kotlin.String** |  |  [optional] |
 | **userStatus** | **kotlin.Int** | User Status |  [optional] |
 | **category** | [**ApiCategory**](ApiCategory.md) |  |  [optional] |
+| **name** | **kotlin.String** |  |  [optional] |
+| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  [optional] |
 | **tags** | [**kotlin.collections.List&lt;ApiTag&gt;**](ApiTag.md) |  |  [optional] |
 | **status** | [**inline**](#Status) | pet status in the store |  [optional] |
 
diff --git a/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/AnyOfUserOrPetOrArrayString.md b/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/AnyOfUserOrPetOrArrayString.md
index 94b65b04752a..e78aa5133533 100644
--- a/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/AnyOfUserOrPetOrArrayString.md
+++ b/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/AnyOfUserOrPetOrArrayString.md
@@ -4,10 +4,8 @@
 ## Properties
 | Name | Type | Description | Notes |
 | ------------ | ------------- | ------------- | ------------- |
-| **username** | **kotlin.String** |  |  |
-| **name** | **kotlin.String** |  |  |
-| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  |
 | **id** | **kotlin.Long** |  |  [optional] |
+| **username** | **kotlin.String** |  |  [optional] |
 | **firstName** | **kotlin.String** |  |  [optional] |
 | **lastName** | **kotlin.String** |  |  [optional] |
 | **email** | **kotlin.String** |  |  [optional] |
@@ -15,6 +13,8 @@
 | **phone** | **kotlin.String** |  |  [optional] |
 | **userStatus** | **kotlin.Int** | User Status |  [optional] |
 | **category** | [**ApiCategory**](ApiCategory.md) |  |  [optional] |
+| **name** | **kotlin.String** |  |  [optional] |
+| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  [optional] |
 | **tags** | [**kotlin.collections.List&lt;ApiTag&gt;**](ApiTag.md) |  |  [optional] |
 | **status** | [**inline**](#Status) | pet status in the store |  [optional] |
 
diff --git a/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/UserOrPet.md b/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/UserOrPet.md
index 290bbb200183..d5c665979e0c 100644
--- a/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/UserOrPet.md
+++ b/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/UserOrPet.md
@@ -4,10 +4,8 @@
 ## Properties
 | Name | Type | Description | Notes |
 | ------------ | ------------- | ------------- | ------------- |
-| **username** | **kotlin.String** |  |  |
-| **name** | **kotlin.String** |  |  |
-| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  |
 | **id** | **kotlin.Long** |  |  [optional] |
+| **username** | **kotlin.String** |  |  [optional] |
 | **firstName** | **kotlin.String** |  |  [optional] |
 | **lastName** | **kotlin.String** |  |  [optional] |
 | **email** | **kotlin.String** |  |  [optional] |
@@ -15,6 +13,8 @@
 | **phone** | **kotlin.String** |  |  [optional] |
 | **userStatus** | **kotlin.Int** | User Status |  [optional] |
 | **category** | [**ApiCategory**](ApiCategory.md) |  |  [optional] |
+| **name** | **kotlin.String** |  |  [optional] |
+| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  [optional] |
 | **tags** | [**kotlin.collections.List&lt;ApiTag&gt;**](ApiTag.md) |  |  [optional] |
 | **status** | [**inline**](#Status) | pet status in the store |  [optional] |
 
diff --git a/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/UserOrPetOrArrayString.md b/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/UserOrPetOrArrayString.md
index 0ec0493c434e..c2d9fff0cf6d 100644
--- a/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/UserOrPetOrArrayString.md
+++ b/samples/client/petstore/kotlin-model-prefix-type-mappings/docs/UserOrPetOrArrayString.md
@@ -4,10 +4,8 @@
 ## Properties
 | Name | Type | Description | Notes |
 | ------------ | ------------- | ------------- | ------------- |
-| **username** | **kotlin.String** |  |  |
-| **name** | **kotlin.String** |  |  |
-| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  |
 | **id** | **kotlin.Long** |  |  [optional] |
+| **username** | **kotlin.String** |  |  [optional] |
 | **firstName** | **kotlin.String** |  |  [optional] |
 | **lastName** | **kotlin.String** |  |  [optional] |
 | **email** | **kotlin.String** |  |  [optional] |
@@ -15,6 +13,8 @@
 | **phone** | **kotlin.String** |  |  [optional] |
 | **userStatus** | **kotlin.Int** | User Status |  [optional] |
 | **category** | [**ApiCategory**](ApiCategory.md) |  |  [optional] |
+| **name** | **kotlin.String** |  |  [optional] |
+| **photoUrls** | **kotlin.collections.List&lt;kotlin.String&gt;** |  |  [optional] |
 | **tags** | [**kotlin.collections.List&lt;ApiTag&gt;**](ApiTag.md) |  |  [optional] |
 | **status** | [**inline**](#Status) | pet status in the store |  [optional] |
 
diff --git a/samples/client/petstore/powershell/docs/FruitReq.md b/samples/client/petstore/powershell/docs/FruitReq.md
index d8fcd89ee5e1..93900c8558b3 100644
--- a/samples/client/petstore/powershell/docs/FruitReq.md
+++ b/samples/client/petstore/powershell/docs/FruitReq.md
@@ -3,9 +3,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **String** |  | 
+**Cultivar** | **String** |  | [optional] 
 **Mealy** | **Boolean** |  | [optional] 
-**LengthCm** | **Decimal** |  | 
+**LengthCm** | **Decimal** |  | [optional] 
 **Sweet** | **Boolean** |  | [optional] 
 
 ## Examples
diff --git a/samples/client/petstore/powershell/docs/NullableShape.md b/samples/client/petstore/powershell/docs/NullableShape.md
index 127110ad1c0d..42f494a6a62d 100644
--- a/samples/client/petstore/powershell/docs/NullableShape.md
+++ b/samples/client/petstore/powershell/docs/NullableShape.md
@@ -4,8 +4,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **String** |  | 
-**TriangleType** | **String** |  | 
-**QuadrilateralType** | **String** |  | 
+**TriangleType** | **String** |  | [optional] 
+**QuadrilateralType** | **String** |  | [optional] 
 
 ## Examples
 
diff --git a/samples/client/petstore/powershell/docs/Shape.md b/samples/client/petstore/powershell/docs/Shape.md
index 42b008286a5d..fc09d74b9b0a 100644
--- a/samples/client/petstore/powershell/docs/Shape.md
+++ b/samples/client/petstore/powershell/docs/Shape.md
@@ -4,8 +4,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **String** |  | 
-**TriangleType** | **String** |  | 
-**QuadrilateralType** | **String** |  | 
+**TriangleType** | **String** |  | [optional] 
+**QuadrilateralType** | **String** |  | [optional] 
 
 ## Examples
 
diff --git a/samples/client/petstore/powershell/docs/ShapeOrNull.md b/samples/client/petstore/powershell/docs/ShapeOrNull.md
index e237db3c1155..c84c620f65fb 100644
--- a/samples/client/petstore/powershell/docs/ShapeOrNull.md
+++ b/samples/client/petstore/powershell/docs/ShapeOrNull.md
@@ -4,8 +4,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **ShapeType** | **String** |  | 
-**TriangleType** | **String** |  | 
-**QuadrilateralType** | **String** |  | 
+**TriangleType** | **String** |  | [optional] 
+**QuadrilateralType** | **String** |  | [optional] 
 
 ## Examples
 
diff --git a/samples/client/petstore/rust/hyper/test-duplicates/src/models/_tests_discriminator_duplicate_enums_get_200_response.rs b/samples/client/petstore/rust/hyper/test-duplicates/src/models/_tests_discriminator_duplicate_enums_get_200_response.rs
index 91ae6492101b..c1dfdd2ffb5c 100644
--- a/samples/client/petstore/rust/hyper/test-duplicates/src/models/_tests_discriminator_duplicate_enums_get_200_response.rs
+++ b/samples/client/petstore/rust/hyper/test-duplicates/src/models/_tests_discriminator_duplicate_enums_get_200_response.rs
@@ -18,28 +18,28 @@ pub enum TestsDiscriminatorDuplicateEnumsGet200Response {
     Vehicle {
         #[serde(rename = "type")]
         r#type: String,
-        #[serde(rename = "name")]
-        name: String,
-        #[serde(rename = "speed")]
-        speed: f64,
+        #[serde(rename = "name", skip_serializing_if = "Option::is_none")]
+        name: Option<String>,
+        #[serde(rename = "speed", skip_serializing_if = "Option::is_none")]
+        speed: Option<f64>,
     },
     #[serde(rename="student")]
     PersonStudent {
         #[serde(rename = "type")]
         r#type: String,
-        #[serde(rename = "name")]
-        name: String,
-        #[serde(rename = "speed")]
-        speed: f64,
+        #[serde(rename = "name", skip_serializing_if = "Option::is_none")]
+        name: Option<String>,
+        #[serde(rename = "speed", skip_serializing_if = "Option::is_none")]
+        speed: Option<f64>,
     },
     #[serde(rename="teacher")]
     PersonTeacher {
         #[serde(rename = "type")]
         r#type: String,
-        #[serde(rename = "name")]
-        name: String,
-        #[serde(rename = "speed")]
-        speed: f64,
+        #[serde(rename = "name", skip_serializing_if = "Option::is_none")]
+        name: Option<String>,
+        #[serde(rename = "speed", skip_serializing_if = "Option::is_none")]
+        speed: Option<f64>,
     },
 }
 
diff --git a/samples/client/petstore/rust/reqwest/test-duplicates/src/models/_tests_discriminator_duplicate_enums_get_200_response.rs b/samples/client/petstore/rust/reqwest/test-duplicates/src/models/_tests_discriminator_duplicate_enums_get_200_response.rs
index 91ae6492101b..c1dfdd2ffb5c 100644
--- a/samples/client/petstore/rust/reqwest/test-duplicates/src/models/_tests_discriminator_duplicate_enums_get_200_response.rs
+++ b/samples/client/petstore/rust/reqwest/test-duplicates/src/models/_tests_discriminator_duplicate_enums_get_200_response.rs
@@ -18,28 +18,28 @@ pub enum TestsDiscriminatorDuplicateEnumsGet200Response {
     Vehicle {
         #[serde(rename = "type")]
         r#type: String,
-        #[serde(rename = "name")]
-        name: String,
-        #[serde(rename = "speed")]
-        speed: f64,
+        #[serde(rename = "name", skip_serializing_if = "Option::is_none")]
+        name: Option<String>,
+        #[serde(rename = "speed", skip_serializing_if = "Option::is_none")]
+        speed: Option<f64>,
     },
     #[serde(rename="student")]
     PersonStudent {
         #[serde(rename = "type")]
         r#type: String,
-        #[serde(rename = "name")]
-        name: String,
-        #[serde(rename = "speed")]
-        speed: f64,
+        #[serde(rename = "name", skip_serializing_if = "Option::is_none")]
+        name: Option<String>,
+        #[serde(rename = "speed", skip_serializing_if = "Option::is_none")]
+        speed: Option<f64>,
     },
     #[serde(rename="teacher")]
     PersonTeacher {
         #[serde(rename = "type")]
         r#type: String,
-        #[serde(rename = "name")]
-        name: String,
-        #[serde(rename = "speed")]
-        speed: f64,
+        #[serde(rename = "name", skip_serializing_if = "Option::is_none")]
+        name: Option<String>,
+        #[serde(rename = "speed", skip_serializing_if = "Option::is_none")]
+        speed: Option<f64>,
     },
 }
 
diff --git a/samples/client/petstore/typescript-axios/builds/composed-schemas/api.ts b/samples/client/petstore/typescript-axios/builds/composed-schemas/api.ts
index eeb417819705..c590d35e490f 100644
--- a/samples/client/petstore/typescript-axios/builds/composed-schemas/api.ts
+++ b/samples/client/petstore/typescript-axios/builds/composed-schemas/api.ts
@@ -64,9 +64,9 @@ export const PetByTypePetTypeEnum = {
 export type PetByTypePetTypeEnum = typeof PetByTypePetTypeEnum[keyof typeof PetByTypePetTypeEnum];
 
 export interface PetsFilteredPatchRequest {
-    'age': number;
+    'age'?: number;
     'nickname'?: string;
-    'pet_type': PetsFilteredPatchRequestPetTypeEnum;
+    'pet_type'?: PetsFilteredPatchRequestPetTypeEnum;
     'hunts'?: boolean;
 }
 
diff --git a/samples/client/petstore/typescript-axios/builds/composed-schemas/docs/PetsFilteredPatchRequest.md b/samples/client/petstore/typescript-axios/builds/composed-schemas/docs/PetsFilteredPatchRequest.md
index 6d8ff67b1ad9..7b3974d87088 100644
--- a/samples/client/petstore/typescript-axios/builds/composed-schemas/docs/PetsFilteredPatchRequest.md
+++ b/samples/client/petstore/typescript-axios/builds/composed-schemas/docs/PetsFilteredPatchRequest.md
@@ -5,9 +5,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**age** | **number** |  | [default to undefined]
+**age** | **number** |  | [optional] [default to undefined]
 **nickname** | **string** |  | [optional] [default to undefined]
-**pet_type** | **string** |  | [default to undefined]
+**pet_type** | **string** |  | [optional] [default to undefined]
 **hunts** | **boolean** |  | [optional] [default to undefined]
 
 ## Example
diff --git a/samples/client/petstore/typescript-axios/builds/test-petstore/docs/FruitReq.md b/samples/client/petstore/typescript-axios/builds/test-petstore/docs/FruitReq.md
index 81b3d6c81a7b..5a0afbd440ad 100644
--- a/samples/client/petstore/typescript-axios/builds/test-petstore/docs/FruitReq.md
+++ b/samples/client/petstore/typescript-axios/builds/test-petstore/docs/FruitReq.md
@@ -5,9 +5,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**cultivar** | **string** |  | [default to undefined]
+**cultivar** | **string** |  | [optional] [default to undefined]
 **mealy** | **boolean** |  | [optional] [default to undefined]
-**lengthCm** | **number** |  | [default to undefined]
+**lengthCm** | **number** |  | [optional] [default to undefined]
 **sweet** | **boolean** |  | [optional] [default to undefined]
 
 ## Example
diff --git a/samples/client/petstore/typescript-axios/builds/test-petstore/docs/NullableShape.md b/samples/client/petstore/typescript-axios/builds/test-petstore/docs/NullableShape.md
index 80f70ecefa53..f9e25a47594a 100644
--- a/samples/client/petstore/typescript-axios/builds/test-petstore/docs/NullableShape.md
+++ b/samples/client/petstore/typescript-axios/builds/test-petstore/docs/NullableShape.md
@@ -7,8 +7,8 @@ The value may be a shape or the \'null\' value. The \'nullable\' attribute was i
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **shapeType** | **string** |  | [default to undefined]
-**triangleType** | **string** |  | [default to undefined]
-**quadrilateralType** | **string** |  | [default to undefined]
+**triangleType** | **string** |  | [optional] [default to undefined]
+**quadrilateralType** | **string** |  | [optional] [default to undefined]
 
 ## Example
 
diff --git a/samples/client/petstore/typescript-axios/builds/test-petstore/docs/Shape.md b/samples/client/petstore/typescript-axios/builds/test-petstore/docs/Shape.md
index e135140f28cd..67fc20ee3554 100644
--- a/samples/client/petstore/typescript-axios/builds/test-petstore/docs/Shape.md
+++ b/samples/client/petstore/typescript-axios/builds/test-petstore/docs/Shape.md
@@ -6,8 +6,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **shapeType** | **string** |  | [default to undefined]
-**triangleType** | **string** |  | [default to undefined]
-**quadrilateralType** | **string** |  | [default to undefined]
+**triangleType** | **string** |  | [optional] [default to undefined]
+**quadrilateralType** | **string** |  | [optional] [default to undefined]
 
 ## Example
 
diff --git a/samples/client/petstore/typescript-axios/builds/test-petstore/docs/ShapeOrNull.md b/samples/client/petstore/typescript-axios/builds/test-petstore/docs/ShapeOrNull.md
index 79f281d4a005..2586cb696a0f 100644
--- a/samples/client/petstore/typescript-axios/builds/test-petstore/docs/ShapeOrNull.md
+++ b/samples/client/petstore/typescript-axios/builds/test-petstore/docs/ShapeOrNull.md
@@ -7,8 +7,8 @@ The value may be a shape or the \'null\' value. This is introduced in OAS schema
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **shapeType** | **string** |  | [default to undefined]
-**triangleType** | **string** |  | [default to undefined]
-**quadrilateralType** | **string** |  | [default to undefined]
+**triangleType** | **string** |  | [optional] [default to undefined]
+**quadrilateralType** | **string** |  | [optional] [default to undefined]
 
 ## Example
 
diff --git a/samples/client/petstore/typescript-axios/builds/with-fake-endpoints-models-for-testing-with-http-signature/docs/FruitReq.md b/samples/client/petstore/typescript-axios/builds/with-fake-endpoints-models-for-testing-with-http-signature/docs/FruitReq.md
index 81b3d6c81a7b..5a0afbd440ad 100644
--- a/samples/client/petstore/typescript-axios/builds/with-fake-endpoints-models-for-testing-with-http-signature/docs/FruitReq.md
+++ b/samples/client/petstore/typescript-axios/builds/with-fake-endpoints-models-for-testing-with-http-signature/docs/FruitReq.md
@@ -5,9 +5,9 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**cultivar** | **string** |  | [default to undefined]
+**cultivar** | **string** |  | [optional] [default to undefined]
 **mealy** | **boolean** |  | [optional] [default to undefined]
-**lengthCm** | **number** |  | [default to undefined]
+**lengthCm** | **number** |  | [optional] [default to undefined]
 **sweet** | **boolean** |  | [optional] [default to undefined]
 
 ## Example
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/doc/BarRefOrValue.md b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/doc/BarRefOrValue.md
index f1a1dfd35472..784feeecac15 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/doc/BarRefOrValue.md
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/doc/BarRefOrValue.md
@@ -9,7 +9,7 @@ import 'package:openapi/api.dart';
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **href** | **String** | Hyperlink reference | [optional] 
-**id** | **String** | unique identifier | 
+**id** | **String** | unique identifier | [optional] 
 **atSchemaLocation** | **String** | A URI to a JSON-Schema file that defines additional attributes and relationships | [optional] 
 **atBaseType** | **String** | When sub-classing, this defines the super-class | [optional] 
 **atType** | **String** | When sub-classing, this defines the sub-class Extensible name | 
diff --git a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/doc/Fruit.md b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/doc/Fruit.md
index 91c1f1cf9b55..c93fb82f05ce 100644
--- a/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/doc/Fruit.md
+++ b/samples/openapi3/client/petstore/dart-dio/oneof_polymorphism_and_inheritance/doc/Fruit.md
@@ -9,8 +9,8 @@ import 'package:openapi/api.dart';
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **fruitType** | [**FruitType**](FruitType.md) |  | 
-**seeds** | **int** |  | 
-**length** | **int** |  | 
+**seeds** | **int** |  | [optional] 
+**length** | **int** |  | [optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 
diff --git a/samples/openapi3/client/petstore/go/go-petstore/docs/FruitReq.md b/samples/openapi3/client/petstore/go/go-petstore/docs/FruitReq.md
index 1128c2be20e1..035a8429915d 100644
--- a/samples/openapi3/client/petstore/go/go-petstore/docs/FruitReq.md
+++ b/samples/openapi3/client/petstore/go/go-petstore/docs/FruitReq.md
@@ -4,16 +4,16 @@
 
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
-**Cultivar** | **string** |  | 
+**Cultivar** | Pointer to **string** |  | [optional] 
 **Mealy** | Pointer to **bool** |  | [optional] 
-**LengthCm** | **float32** |  | 
+**LengthCm** | Pointer to **float32** |  | [optional] 
 **Sweet** | Pointer to **bool** |  | [optional] 
 
 ## Methods
 
 ### NewFruitReq
 
-`func NewFruitReq(cultivar string, lengthCm float32, ) *FruitReq`
+`func NewFruitReq() *FruitReq`
 
 NewFruitReq instantiates a new FruitReq object
 This constructor will assign default values to properties that have it defined,
@@ -47,6 +47,11 @@ and a boolean to check if the value has been set.
 
 SetCultivar sets Cultivar field to given value.
 
+### HasCultivar
+
+`func (o *FruitReq) HasCultivar() bool`
+
+HasCultivar returns a boolean if a field has been set.
 
 ### GetMealy
 
@@ -92,6 +97,11 @@ and a boolean to check if the value has been set.
 
 SetLengthCm sets LengthCm field to given value.
 
+### HasLengthCm
+
+`func (o *FruitReq) HasLengthCm() bool`
+
+HasLengthCm returns a boolean if a field has been set.
 
 ### GetSweet
 
diff --git a/samples/openapi3/client/petstore/python-aiohttp/docs/AnyOfPig.md b/samples/openapi3/client/petstore/python-aiohttp/docs/AnyOfPig.md
index 9367e2261898..1700385c96d2 100644
--- a/samples/openapi3/client/petstore/python-aiohttp/docs/AnyOfPig.md
+++ b/samples/openapi3/client/petstore/python-aiohttp/docs/AnyOfPig.md
@@ -6,8 +6,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **class_name** | **str** |  | 
-**color** | **str** |  | 
-**size** | **int** |  | 
+**color** | **str** |  | [optional] 
+**size** | **int** |  | [optional] 
 
 ## Example
 
diff --git a/samples/openapi3/client/petstore/python-aiohttp/docs/Pig.md b/samples/openapi3/client/petstore/python-aiohttp/docs/Pig.md
index 625930676083..f8a70800c1e4 100644
--- a/samples/openapi3/client/petstore/python-aiohttp/docs/Pig.md
+++ b/samples/openapi3/client/petstore/python-aiohttp/docs/Pig.md
@@ -6,8 +6,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **class_name** | **str** |  | 
-**color** | **str** |  | 
-**size** | **int** |  | 
+**color** | **str** |  | [optional] 
+**size** | **int** |  | [optional] 
 
 ## Example
 
diff --git a/samples/openapi3/client/petstore/python-httpx/docs/AnyOfPig.md b/samples/openapi3/client/petstore/python-httpx/docs/AnyOfPig.md
index 9367e2261898..1700385c96d2 100644
--- a/samples/openapi3/client/petstore/python-httpx/docs/AnyOfPig.md
+++ b/samples/openapi3/client/petstore/python-httpx/docs/AnyOfPig.md
@@ -6,8 +6,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **class_name** | **str** |  | 
-**color** | **str** |  | 
-**size** | **int** |  | 
+**color** | **str** |  | [optional] 
+**size** | **int** |  | [optional] 
 
 ## Example
 
diff --git a/samples/openapi3/client/petstore/python-httpx/docs/Pig.md b/samples/openapi3/client/petstore/python-httpx/docs/Pig.md
index 625930676083..f8a70800c1e4 100644
--- a/samples/openapi3/client/petstore/python-httpx/docs/Pig.md
+++ b/samples/openapi3/client/petstore/python-httpx/docs/Pig.md
@@ -6,8 +6,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **class_name** | **str** |  | 
-**color** | **str** |  | 
-**size** | **int** |  | 
+**color** | **str** |  | [optional] 
+**size** | **int** |  | [optional] 
 
 ## Example
 
diff --git a/samples/openapi3/client/petstore/python-lazyImports/docs/AnyOfPig.md b/samples/openapi3/client/petstore/python-lazyImports/docs/AnyOfPig.md
index 9367e2261898..1700385c96d2 100644
--- a/samples/openapi3/client/petstore/python-lazyImports/docs/AnyOfPig.md
+++ b/samples/openapi3/client/petstore/python-lazyImports/docs/AnyOfPig.md
@@ -6,8 +6,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **class_name** | **str** |  | 
-**color** | **str** |  | 
-**size** | **int** |  | 
+**color** | **str** |  | [optional] 
+**size** | **int** |  | [optional] 
 
 ## Example
 
diff --git a/samples/openapi3/client/petstore/python-lazyImports/docs/Pig.md b/samples/openapi3/client/petstore/python-lazyImports/docs/Pig.md
index 625930676083..f8a70800c1e4 100644
--- a/samples/openapi3/client/petstore/python-lazyImports/docs/Pig.md
+++ b/samples/openapi3/client/petstore/python-lazyImports/docs/Pig.md
@@ -6,8 +6,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **class_name** | **str** |  | 
-**color** | **str** |  | 
-**size** | **int** |  | 
+**color** | **str** |  | [optional] 
+**size** | **int** |  | [optional] 
 
 ## Example
 
diff --git a/samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/docs/AnyOfPig.md b/samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/docs/AnyOfPig.md
index 7c39ea27e99c..1061acfdca27 100644
--- a/samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/docs/AnyOfPig.md
+++ b/samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/docs/AnyOfPig.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **class_name** | **str** |  | 
-**color** | **str** |  | 
-**size** | **int** |  | 
+**color** | **str** |  | [optional] 
+**size** | **int** |  | [optional] 
 
 ## Example
 
diff --git a/samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/docs/Pig.md b/samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/docs/Pig.md
index e729adee35e7..2e85d03bc832 100644
--- a/samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/docs/Pig.md
+++ b/samples/openapi3/client/petstore/python-pydantic-v1-aiohttp/docs/Pig.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **class_name** | **str** |  | 
-**color** | **str** |  | 
-**size** | **int** |  | 
+**color** | **str** |  | [optional] 
+**size** | **int** |  | [optional] 
 
 ## Example
 
diff --git a/samples/openapi3/client/petstore/python-pydantic-v1/docs/AnyOfPig.md b/samples/openapi3/client/petstore/python-pydantic-v1/docs/AnyOfPig.md
index 7c39ea27e99c..1061acfdca27 100644
--- a/samples/openapi3/client/petstore/python-pydantic-v1/docs/AnyOfPig.md
+++ b/samples/openapi3/client/petstore/python-pydantic-v1/docs/AnyOfPig.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **class_name** | **str** |  | 
-**color** | **str** |  | 
-**size** | **int** |  | 
+**color** | **str** |  | [optional] 
+**size** | **int** |  | [optional] 
 
 ## Example
 
diff --git a/samples/openapi3/client/petstore/python-pydantic-v1/docs/Pig.md b/samples/openapi3/client/petstore/python-pydantic-v1/docs/Pig.md
index e729adee35e7..2e85d03bc832 100644
--- a/samples/openapi3/client/petstore/python-pydantic-v1/docs/Pig.md
+++ b/samples/openapi3/client/petstore/python-pydantic-v1/docs/Pig.md
@@ -5,8 +5,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **class_name** | **str** |  | 
-**color** | **str** |  | 
-**size** | **int** |  | 
+**color** | **str** |  | [optional] 
+**size** | **int** |  | [optional] 
 
 ## Example
 
diff --git a/samples/openapi3/client/petstore/python/docs/AnyOfPig.md b/samples/openapi3/client/petstore/python/docs/AnyOfPig.md
index 9367e2261898..1700385c96d2 100644
--- a/samples/openapi3/client/petstore/python/docs/AnyOfPig.md
+++ b/samples/openapi3/client/petstore/python/docs/AnyOfPig.md
@@ -6,8 +6,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **class_name** | **str** |  | 
-**color** | **str** |  | 
-**size** | **int** |  | 
+**color** | **str** |  | [optional] 
+**size** | **int** |  | [optional] 
 
 ## Example
 
diff --git a/samples/openapi3/client/petstore/python/docs/Pig.md b/samples/openapi3/client/petstore/python/docs/Pig.md
index 625930676083..f8a70800c1e4 100644
--- a/samples/openapi3/client/petstore/python/docs/Pig.md
+++ b/samples/openapi3/client/petstore/python/docs/Pig.md
@@ -6,8 +6,8 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **class_name** | **str** |  | 
-**color** | **str** |  | 
-**size** | **int** |  | 
+**color** | **str** |  | [optional] 
+**size** | **int** |  | [optional] 
 
 ## Example
 
diff --git a/samples/openapi3/client/petstore/typescript/builds/composed-schemas/models/PetsFilteredPatchRequest.ts b/samples/openapi3/client/petstore/typescript/builds/composed-schemas/models/PetsFilteredPatchRequest.ts
index 067783a53328..6918bce3732d 100644
--- a/samples/openapi3/client/petstore/typescript/builds/composed-schemas/models/PetsFilteredPatchRequest.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/composed-schemas/models/PetsFilteredPatchRequest.ts
@@ -15,9 +15,9 @@ import { PetByType } from '../models/PetByType';
 import { HttpFile } from '../http/http';
 
 export class PetsFilteredPatchRequest {
-    'age': number;
+    'age'?: number;
     'nickname'?: string;
-    'petType': PetsFilteredPatchRequestPetTypeEnum;
+    'petType'?: PetsFilteredPatchRequestPetTypeEnum;
     'hunts'?: boolean;
 
     static readonly discriminator: string | undefined = undefined;
diff --git a/samples/server/others/kotlin-server/polymorphism-and-discriminator/src/main/kotlin/org/openapitools/server/models/Pet.kt b/samples/server/others/kotlin-server/polymorphism-and-discriminator/src/main/kotlin/org/openapitools/server/models/Pet.kt
index 30ada8deb372..235404345b7d 100644
--- a/samples/server/others/kotlin-server/polymorphism-and-discriminator/src/main/kotlin/org/openapitools/server/models/Pet.kt
+++ b/samples/server/others/kotlin-server/polymorphism-and-discriminator/src/main/kotlin/org/openapitools/server/models/Pet.kt
@@ -27,6 +27,7 @@ sealed class Pet(
     
     @field:com.fasterxml.jackson.annotation.JsonProperty("petType")
     open val petType: kotlin.String
+,
 
 )
 
diff --git a/samples/server/others/kotlin-server/polymorphism/src/main/kotlin/org/openapitools/server/models/Pet.kt b/samples/server/others/kotlin-server/polymorphism/src/main/kotlin/org/openapitools/server/models/Pet.kt
index 438e3b01ae8d..7be51e8f2c46 100644
--- a/samples/server/others/kotlin-server/polymorphism/src/main/kotlin/org/openapitools/server/models/Pet.kt
+++ b/samples/server/others/kotlin-server/polymorphism/src/main/kotlin/org/openapitools/server/models/Pet.kt
@@ -31,11 +31,11 @@ data class Pet(
     /* The measured skill for hunting */
     
     @field:com.fasterxml.jackson.annotation.JsonProperty("huntingSkill")
-    val huntingSkill: Pet.HuntingSkill,
+    val huntingSkill: Pet.HuntingSkill? = null,
     /* the size of the pack the dog is from */
     
     @field:com.fasterxml.jackson.annotation.JsonProperty("packSize")
-    val packSize: kotlin.Int = 0
+    val packSize: kotlin.Int? = 0
 )
 {
     /**
diff --git a/samples/server/petstore/cpp-httplib-server/feature-test/models/PaymentMethod.h b/samples/server/petstore/cpp-httplib-server/feature-test/models/PaymentMethod.h
index 0f5d86c9fae5..1de1c1710887 100644
--- a/samples/server/petstore/cpp-httplib-server/feature-test/models/PaymentMethod.h
+++ b/samples/server/petstore/cpp-httplib-server/feature-test/models/PaymentMethod.h
@@ -8,6 +8,7 @@
 // System headers
 #include <nlohmann/json.hpp>
 #include <variant>
+#include <optional>
 #include <string>
 #include "BankAccount.h"
 #include "CreditCard.h"
diff --git a/samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/AnyOfUserOrPet.kt b/samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/AnyOfUserOrPet.kt
index 317d5386108e..1f0bcac0fb95 100644
--- a/samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/AnyOfUserOrPet.kt
+++ b/samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/AnyOfUserOrPet.kt
@@ -21,10 +21,8 @@ import io.swagger.v3.oas.annotations.media.Schema
 
 /**
  * 
- * @param username 
- * @param name 
- * @param photoUrls 
  * @param id 
+ * @param username 
  * @param firstName 
  * @param lastName 
  * @param email 
@@ -32,23 +30,19 @@ import io.swagger.v3.oas.annotations.media.Schema
  * @param phone 
  * @param userStatus User Status
  * @param category 
+ * @param name 
+ * @param photoUrls 
  * @param tags 
  * @param status pet status in the store
  */
 data class AnyOfUserOrPet(
 
-    @Schema(example = "null", required = true, description = "")
-    @get:JsonProperty("username", required = true) val username: kotlin.String,
-
-    @Schema(example = "doggie", required = true, description = "")
-    @get:JsonProperty("name", required = true) val name: kotlin.String,
-
-    @Schema(example = "null", required = true, description = "")
-    @get:JsonProperty("photoUrls", required = true) val photoUrls: kotlin.collections.List<kotlin.String>,
-
     @Schema(example = "null", description = "")
     @get:JsonProperty("id") val id: kotlin.Long? = null,
 
+    @Schema(example = "null", description = "")
+    @get:JsonProperty("username") val username: kotlin.String? = null,
+
     @Schema(example = "null", description = "")
     @get:JsonProperty("firstName") val firstName: kotlin.String? = null,
 
@@ -71,6 +65,12 @@ data class AnyOfUserOrPet(
     @Schema(example = "null", description = "")
     @get:JsonProperty("category") val category: Category? = null,
 
+    @Schema(example = "doggie", description = "")
+    @get:JsonProperty("name") val name: kotlin.String? = null,
+
+    @Schema(example = "null", description = "")
+    @get:JsonProperty("photoUrls") val photoUrls: kotlin.collections.List<kotlin.String>? = null,
+
     @field:Valid
     @Schema(example = "null", description = "")
     @get:JsonProperty("tags") val tags: kotlin.collections.List<Tag>? = null,
diff --git a/samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/AnyOfUserOrPetOrArrayString.kt b/samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/AnyOfUserOrPetOrArrayString.kt
index 03df455663f1..08d0521ac331 100644
--- a/samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/AnyOfUserOrPetOrArrayString.kt
+++ b/samples/server/petstore/kotlin-spring-default/src/main/kotlin/org/openapitools/model/AnyOfUserOrPetOrArrayString.kt
@@ -21,10 +21,8 @@ import io.swagger.v3.oas.annotations.media.Schema
 
 /**
  * 
- * @param username 
- * @param name 
- * @param photoUrls 
  * @param id 
+ * @param username 
  * @param firstName 
  * @param lastName 
  * @param email 
@@ -32,23 +30,19 @@ import io.swagger.v3.oas.annotations.media.Schema
  * @param phone 
  * @param userStatus User Status
  * @param category 
+ * @param name 
+ * @param photoUrls 
  * @param tags 
  * @param status pet status in the store
  */
 data class AnyOfUserOrPetOrArrayString(
 
-    @Schema(example = "null", required = true, description = "")
-    @get:JsonProperty("username", required = true) val username: kotlin.String,
-
-    @Schema(example = "doggie", required = true, description = "")
-    @get:JsonProperty("name", required = true) val name: kotlin.String,
-
-    @Schema(example = "null", required = true, description = "")
-    @get:JsonProperty("photoUrls", required = true) val photoUrls: kotlin.collections.List<kotlin.String>,
-
     @Schema(example = "null", description = "")
     @get:JsonProperty("id") val id: kotlin.Long? = null,
 
+    @Schema(example = "null", description = "")
+    @get:JsonProperty("username") val username: kotlin.String? = null,
+
     @Schema(example = "null", description = "")
     @get:JsonProperty("firstName") val firstName: kotlin.String? = null,
 
@@ -71,6 +65,12 @@ data class AnyOfUserOrPetOrArrayString(
     @Schema(example = "null", description = "")
     @get:JsonProperty("category") val category: Category? = null,
 
+    @Schema(example = "doggie", description = "")
+    @get:JsonProperty("name") val name: kotlin.String? = null,
+
+    @Schema(example = "null", description = "")
+    @get:JsonProperty("photoUrls") val photoUrls: kotlin.collections.List<kotlin.String>? = null,
+
     @field:Valid
     @Schema(example = "null", description = "")
     @get:JsonProperty("tags") val tags: kotlin.collections.List<Tag>? = null,