'Register an event handler to be called last for an event.
All event handlers registered with ``register_last()`` will be called
after handlers registered with ``register_first()`` and ``register()``.'

def register_last(self, event_name, handler, unique_id=None, unique_id_uses_count=False):

    self._verify_and_register(event_name, handler, unique_id, register_method=self._register_last, unique_id_uses_count=unique_id_uses_count)
