code: def contained(self, key, include_self=True, exclusive=False, biggest_first=True, only=None):
          
          if 'RoW' not in self:
              if key == 'RoW':
                  return ['RoW'] if 'RoW' in (only or []) else []
              elif only and 'RoW' in only:
                  only.pop(only.index('RoW'))
  
          possibles = self.topology if only is None else {k: self[k] for k in only}
  
          faces = self[key]
          lst = [
              (k, len(v))
              for k, v in possibles.items()
              if v and faces.issuperset(v)
          ]
          return self._finish_filter(lst, key, include_self, exclusive, biggest_first)
docs: Get all locations that are completely within this location.
  
          If the ``resolved_row`` context manager is not used, ``RoW`` doesn't have a spatial definition. Therefore, ``.contained("RoW")`` returns a list with either ``RoW`` or nothing.