def execute(self, context):
        """Abstract method that must be overriden by a subclass."""
        # Pythons ABC class and Blender's operators do not work well
        # together in the context of multiple inheritance.
        raise NotImplementedError("Subclasses must override this function!")
Abstract method that must be overriden by a subclass.
photogrammetry_importer/operators/import_op.py