This generator implements the idea of collaboration-based design outlined in Chapter 6 of "Feature-Oriented Software Product Lines" (see http://www.springer.com/de/book/9783642375200). Features are mapped to collaborations (see \FeaturePhp\Collaboration\Collaboration) which are in turn a set of roles. A \FeaturePhp\Collaboration\Role is the base code for a class or a class refinement. Depending on the feature selection, corresponding roles in the collaborations are composed into a set of refined files (see \FeaturePhp\File\RefinedFile) implementing the selected features. The concrete composition mechanism may differ from language to language (see \FeaturePhp\Collaboration\Composer).