Currently, a package my.under_scored.package will be translated to My.Under_scored.Package in Elixir by exprotobuf.
The protobuf's official documents shows that the package name should follow underscore style while it's recommend to use CamelCase in Elixir module name.
So I think maybe my.under_scored.package should be translated to My.UnderScored.Package in Elixir.