keep original comments for generated stub methods

[Niels-Be]

Currently (protoc-gen-grpc-kotlin:1.4.1) all generated stub methods get a generic kDoc comment on them.
Something like: Executes this RPC and returns the response message [...]

With protoc-gen-grpc-java the original comments from the proto file are preserved.

Is there a way to preserve the comment for generated Kotlin code aswell or are there plans to implement this feature?