Protected methods

[pointlessone]

RBS currently doesn't support protected method visibility. Protected methods are specified as public in generated rbs files.

Semantically protected methods are not the same as public. So I have a few questions:

• Is this intentional?
• Is protected visibility omitted from the initial release and will be supported later?

[castwide]

If support for protected methods is on the roadmap, I'd be willing to submit a PR for it.

[castwide]

Any interest in this feature? It might be uncommon, but it's still useful ("and Solargraph already supports it," I added humbly).

[skull-squadron]

Protected, private, and public all need typing checking, code-completion, and all the other benefits rbs provides.