code: def __iter__(cls) -> _typing.Iterator[str]:
      results: _typing.MutableSequence[str] = []
      for __identifier, (_, names) in cls.__universal_registry.items():
          results.extend(names)
      return iter(results)
  
file_path: AutoGL/autogl/utils/universal_registry.py
imports: import typing
label_desc: Use image node_id 5 for calling the _UniversalRegistryMetaclass obj's underlying member method code with example usage: obj.__iter__(cls) and returns: iter