code: def set_lights(self, button: bool = None, rails: bool = None):
          
          self._backend.set_lights(button, rails)
docs: Control the robot lights.
  
          :param button: If specified, turn the button light on (`True`) or
                         off (`False`). If not specified, do not change the
                         button light.
          :param rails: If specified, turn the rail lights on (`True`) or
                        off (`False`). If not specified, do not change the
                        rail lights.