Where to find the Codegen source for 'Apex Code Generators' from SwaggerHub API

All,

This is my first message. If this is not the correct 'location', please direct to right one.

 

I am interested in reading the code-generator source for the Swagger Hub Api, especially the client side.

I am trying to consume one SDK for Apex (Salesforce), however it is not deploying. so would like to understand what is going wrong there.

 

Thanks and Regards,

Amit