class_docstr: Operator wrapper for initialization.
class_docstr_tok: ["Operator","wrapper","for","initialization","."]
code: def tag(self):
      return self._tag
  
imports: from typing import Any, Dict, Tuple, Callable, TypeVar
  from functools import partial
  from towhee.runtime.operator_manager import OperatorLoader, OperatorRegistry
  from towhee.utils.log import engine_log
label_desc: Use image node_id 3 for calling the _OperatorWrapper obj's underlying member method code with example usage: obj.tag() and returns: self