docs: def remove_session_id(self, sid):
          """
          Remove all references to a specific Session ID
  
          :param sid: A Session ID
          """
          for uid in self.get('sid2uid', sid):
              self.remove('uid2sid', uid, sid)
          self.delete('sid2uid', sid)
  
          for sub in self.get('sid2sub', sid):
              self.remove('sub2sid', sub, sid)
          self.delete('sid2sub', sid)