[BUG][JAVA] RequestBody multiple contents not working, only takes first one into consideration

Description

Hello guys.

I have this schema example:

post:
      operationId: operation_1
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RequestJson'
          multipart/form-data:
            schema:
              $ref: '#/components/schemas/Request'
          application/x-www-form-urlencoded:
            schema:
              $ref: '#/components/schemas/Request'

Which is valid and generated the correct UI on Swagger UI as seen below

The generated client should have 2 methods, one for application/json content-type that accepts RequestJson body, and another one for application/x-www-form-urlencoded and multipart/form-data content-types that accepts Request body.

This does not occur and instead we only have one method that accepts RequestJson body, even in model folder, there is no Request file, which means that it is only being taken into consideration the RequestJson Model.

Is there any way for me to achieve what I want to achieve with current functionality? Or code needs to be written in order for this to be supported?

Thank you

Start by reproducing the issue with the OpenAPI schema shown in the report and inspect how the Java generator processes multiple requestBody content types. Done means the generated client exposes the appropriate methods and models for the JSON, form-urlencoded, and multipart alternatives; no specific files or tests are named in the issue.