code: def expand(self, **kwargs: OperatorExpandArgument) -> DAGNode:
      if not kwargs:
          raise TypeError("no arguments to expand against")
      self._validate_arg_names("expand", kwargs)
      prevent_duplicates(
          self.partial_kwargs,
          kwargs,
          fail_reason="mapping already partial",
      )
      expand_input = DictOfListsExpandInput(kwargs)
      return self._create_task_group(
          functools.partial(MappedTaskGroup, expand_input=expand_input),
          **self.partial_kwargs,
          **{
              k: MappedArgument(input=expand_input, key=k)
              for k in kwargs
          },
      )
  
imports: from __future__ import annotations
  import functools
  import inspect
  import warnings
  from typing import TYPE_CHECKING, Any, Callable, ClassVar, Generic, Mapping, Sequence, TypeVar, overload
  import attr
  from airflow.decorators.base import ExpandableFactory
  from airflow.models.expandinput import DictOfListsExpandInput, ListOfDictsExpandInput, MappedArgument
  from airflow.models.taskmixin import DAGNode
  from airflow.models.xcom_arg import XComArg
  from airflow.typing_compat import ParamSpec
  from airflow.utils.helpers import prevent_duplicates
  from airflow.utils.task_group import MappedTaskGroup, TaskGroup
label_desc: Use image node_id 8 for calling the _TaskGroupFactory obj's underlying member method code with example usage: obj.expand() and returns: self