class_docstr: Storage type of a mapped operator's mapped kwargs.
  
  This is created from ``expand_kwargs(xcom_arg)``.
code: def get_parse_time_mapped_ti_count(self) -> int:
      if isinstance(self.value, collections.abc.Sized):
          return len(self.value)
      raise NotFullyPopulated({"expand_kwargs() argument"})
  
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 1 for calling the ListOfDictsExpandInput obj's underlying member method code with example usage: obj.get_parse_time_mapped_ti_count() and returns: len