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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def disconnect_pv_clients(self, mris):
 # type: (List[str]) -> None """Disconnect anyone listening to any of the given mris"""

        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)