[REQ] Method generation based on Accept type.

Is your feature request related to a problem? Please describe.

Some APIs have different outputs based on the Accept header type. For example, the endpoint would return SVG when request header is Accept: image/svg+xml or return PNG (binary) when request header is Accept: image/png.

Currently, Java generator does the following:

• Sends ALL accept headers in the request, not being able to control that.
• Generates a single method, using the information only from the first defined Accept.

Describe the solution you'd like

It would be great if the generator can take into account multiple Accept headers (when they exist). In that case it would create a method for each endpoint AND accept type. For example: fooAsImageSvgXml, fooAsImagePng - where the naming As... comes from the Accept definition.

Describe alternatives you've considered

I wanted to change the templates, but I would rather not maintain the fork.

Start by reviewing the Java generator's current handling of multiple Accept headers and how generated method names are derived from the first Accept definition. The work is complete when each endpoint and Accept type produces a distinct method, with the corresponding media type sent independently in its request.