The class configuration must not be abstrac, must be common for all the metamodels. And the dict of elements must be a dict of [feature, bool] instead of [VariabilityModel, bool]. Since the class Feature is part of some metamodel, and any metamodel can implements it, I change the Variability model for the typing Any.
The class configuration must not be abstrac, must be common for all the metamodels. And the dict of elements must be a dict of [feature, bool] instead of [VariabilityModel, bool]. Since the class Feature is part of some metamodel, and any metamodel can implements it, I change the Variability model for the typing Any.