I have two different xtext grammars - URDF and Expr - and I want to do a grammar mixin like so:
I have two questions:
1. I guess, I will have to register Expr in the mwe file in my URDF project, but how? Is there any other config needed?
2. How does the inheritance work? More specifically: I had to remove Terminal from URDf in order to be able to mixin Expr. If Expr has org.eclipse.xtext.common.Terminals as mixin - will I be able to ref Terminals from URDF?