docs: def _get_network_vswitch_map_by_port_id(self, port_id):
          """Get the vswitch name for the received port id."""
          for network_id, vswitch in six.iteritems(self._network_vswitch_map):
              if port_id in vswitch['ports']:
                  return (network_id, vswitch)
  
          # If the port was not found, just return (None, None)
          return (None, None)