Allow 'internal' visibility modifier on models and clients

[davidschreiber]

For multi-modular projects, it would be desireable to reduce the visibility of generated classes (i.e. models and clients) to only the module in which they are used, by applying the internal visibility modifier to generated types. By making the visbility of generated types configurable (e.g. public as it is now, but also internal) projects could decide whether they want to expose the REST types to other modules, or hide the implementation from other parts of the project.

[ulrikandersen]

Hi @davidschreiber,

I've heard that wish from others too.

Would you be up for opening a PR?