Generate example POJO from `APIModelProperty` annotations

I previously asked this question on stackoverflow.

I am writing automated end-to-end tests for an API that makes use of Swagger. I would like to reuse the model classes (and the example property values in particular) in my tests as payload of some HTTP requests to our API. Reusing the annotated model classes allows me to test whether the examples are still up to date and to give a head start to developers writing new tests. However, I found it is unnecessarily complicated to write a generic method to create a model object filled with the example property values from the @APIModelProperty annotations.

This seems like a fairly common use case to me. Therefore, I am considering to contribute to swagger to enable this functionality. Am I welcome to submit a PR for this problem? My suggested approach is as follows:

• Write a separate generic public method in io.swagger.codegen.examples.ExampleGenerator similar to resolveModelToExample, which returns a POJO that will generate the example JSON when serialized
• Refactor duplicated code between the new method and resolveModelToExample
• Write some tests to check edge cases of the new method (such as empty example object, empty properties, nested model objects)

Start in io.swagger.codegen.examples.ExampleGenerator by reading resolveModelToExample and tracing how annotated model properties become example values. Add the proposed POJO-generation entry point, refactor shared logic, and cover empty examples, empty properties, and nested model objects. Done means the returned POJO serializes to the expected example JSON and the edge-case tests pass.