Add @Keep attribute on generated RPC classes

[kmbisset89]

I am running into a problem with proguard and RPC. The application keeps failing on generated RPC classes so I would like them generated with a Keep annotation (for the jvm and android). This would be helpful for all users. The other would be to suggest proguard rules for RPC.

[Mr3zee]

Hey! Thank you for raising the issue! I'll see what we can do with that

[kmbisset89]

@Mr3zee How hard would it be to change the generated class names? I think that is the root of the proguard issue is the $

[Mr3zee]

Not sure at this point, will need to check

[kmbisset89]

@Mr3zee based on my conversation with proguard you need this nondocumented flag for RPC to work with proguard.
-dontprocesskotlinmetadata

[Mr3zee]

Wdym by you need?

[kmbisset89]

Sorry the users of kotlinx RPC will need to add that flag if they want RPC to work in a proguarded build. No action on your part @Mr3zee

[Mr3zee]

Ok, thank you for the solution! I'll close the issue for now as not a priority and maybe we'll return to proguard later in more mature state of the library