How does this support code generation for multiple class in a single swagger.json

[tododo]

Hi there,

Thank you very much for this helpful library. I was trying this out, and it seems that it can not generate multiple classes for a swagger json file contains definitions with different domain object. I have attached the Pets definition referenced on the Swagger official website.
Archive.zip

Any clues to achieve what I wanted? And how do I customize this library to support generation of multiple classes?