Easier access to factory component attributes after building

[timdebruin]

Feature motivation

Sometimes factory components have Fields that we need to access from the code. However once the factory component has already built what it should build these attributes are hard to access. The current way to do this would be for instance:

student = self.__base_getattribute__("model").student_model

Feature description

It would be nice to have some syntactic sugar for the above, for example:

student = self._model.student_model

Where the _name notation would be the way to access the factory component that created whatever the factory is tasked with producing (which would be self.model)