code: def tag(self) -> str:
      """implementation of :class:`~maze.core.wrappers.observation_preprocessing.preprocessors.flatten.FlattenPreProcessor`
      interface
      """
      return __name__.rsplit(".")[-1]
  
imports: from maze.core.wrappers.observation_preprocessing.preprocessors.flatten import FlattenPreProcessor
  from maze.core.annotations import override
label_desc: Use image node_id 1 for calling the DummyPreProcessor obj's underlying member method code with example usage: obj.tag() and returns: __name__