code: def disconnect_pv_clients(self, mris):
          # type: (List[str]) -> None
          
          for mri in mris:
              for pv in self._pvs.pop(mri, {}).values():
                  # Close pv with force destroy on, this will call
                  # onLastDisconnect
                  pv.close(destroy=True, sync=True, timeout=1.0)
docs: Disconnect anyone listening to any of the given mris