code: def flow_rate(self, new_flow_rate: Dict[str, float]) -> None:
          
          self._hw_manager.hardware.set_flow_rate(self._mount, **new_flow_rate)
docs: Update the speeds (in uL/s) for the pipette.
  
          :param new_flow_rate: A dict containing at least one of 'aspirate'
                                and 'dispense', mapping to new speeds in uL/s.