code: def __presence_error(self,stanza):
          
          fr=stanza.get_from()
          key=fr.bare().as_unicode()
          rs=self.rooms.get(key)
          if not rs:
              return False
          rs.process_error_presence(stanza)
          return True
docs: Process an presence error from a MUC room.
  
          :Parameters:
              - `stanza`: the stanza received.
          :Types:
              - `stanza`: `Presence`
  
          :return: `True` if the stanza was properly recognized as generated by
              one of the managed rooms, `False` otherwise.
          :returntype: `bool`