u"""
        Return a clone of given_app with ChordableDjangoBackend, if needed.

def get_suitable_app(cls, given_app):
        u"""
        Return a clone of given_app with ChordableDjangoBackend, if needed.
        """
        if not isinstance(getattr(given_app, 'backend', None), ChordableDjangoBackend):
            return_app = deepcopy(given_app)
            return_app.backend = ChordableDjangoBackend(return_app)
            return return_app
        else:
            return given_app