Check if these issues are valid — if so, understand the root cause of each and fix them.


<file name="modules/openapi-generator/src/main/resources/dart2/serialization/native/native_class.mustache">

<violation number="1" location="modules/openapi-generator/src/main/resources/dart2/serialization/native/native_class.mustache:278">
P1: Inconsistent Optional handling for integer types: uses `json[...] == null` check instead of `json.containsKey()`. This conflates &#39;key absent&#39; with &#39;key present but null value&#39;, defeating the purpose of Optional&lt;T&gt; to distinguish these states. Other Optional cases in this template correctly use `containsKey()`.</violation>

<violation number="2" location="modules/openapi-generator/src/main/resources/dart2/serialization/native/native_class.mustache:282">
P1: Inconsistent Optional handling for number types: uses `json[...] == null` check instead of `json.containsKey()`. This conflates &#39;key absent&#39; with &#39;key present but null value&#39;, defeating the purpose of Optional&lt;T&gt; to distinguish these states.</violation>
</file>

<file name="modules/openapi-generator/src/main/resources/dart/libraries/dio/optional.mustache">

<violation number="1" location="modules/openapi-generator/src/main/resources/dart/libraries/dio/optional.mustache:130">
P1: The `fromJson` method cannot distinguish between an absent field and a field explicitly set to `null`. When JSON contains `{&quot;field&quot;: null}`, this returns `Optional.absent()` instead of `Optional.present(null)`, defeating the core purpose of the Optional class.</violation>
</file>

<file name="modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractDartCodegen.java">

<violation number="1" location="modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractDartCodegen.java:775">
P2: Adding schemas to `patchRequestSchemas` here has no effect because `postProcessModels` has already executed before `postProcessOperationsWithModels`. The `preprocessOpenAPI` method already handles PATCH schema identification at the right time. This code block is effectively dead code that misleads about its functionality.</violation>

<violation number="2" location="modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractDartCodegen.java:813">
P2: Incorrect model name extraction for `Map&lt;K, V&gt;` types. This will extract `String, MyModel` instead of just `MyModel` for `Map&lt;String, MyModel&gt;`, causing the wrong schema name to be added to `patchRequestSchemas`. Consider parsing only the value type for Map (e.g., split by comma and take the last part).</violation>
</file>