def METHOD_NAME(self):
    """Shutdown the properties service.
    This will ensure that all properties are saved.
    """
    self.save()
    self.event_manager.unsubscribe(self.on_model_loaded)
    self.event_manager.unsubscribe(self.on_model_saved)
    self.event_manager.unsubscribe(self.on_model_flushed)