class_docstr: Storage type of a mapped operator's mapped kwargs.
  
  This is created from ``expand(**kwargs)``.
code: def iter_references(self) -> Iterable[tuple[Operator, str]]:
      from airflow.models.xcom_arg import XComArg
  
      for x in self.value.values():
          if isinstance(x, XComArg):
              yield from x.iter_references()
  
imports: from __future__ import annotations
  import collections.abc
  import functools
  import operator
  from typing import TYPE_CHECKING, Any, Dict, Iterable, Mapping, NamedTuple, Sequence, Sized, Union
  import attr
  from airflow.utils.mixins import ResolveMixin
  from airflow.utils.session import NEW_SESSION, provide_session
label_desc: Use image node_id 6 for calling the DictOfListsExpandInput obj's underlying member method code with example usage: obj.iter_references() without return types