code: def _get_combined_index(
      indexes: list[Index],
      intersect: bool = False,
      sort: bool = False,
      copy: bool = False,
  ) -> Index:
      """
      Return the union or intersection of indexes.
  
      Parameters
      ----------
      indexes : list of Index or list objects
          When intersect=True, do not accept list of lists.
      intersect : bool, default False
          If True, calculate the intersection between indexes. Otherwise,
          calculate the union.
      sort : bool, default False
          Whether the result index should come out sorted or not.
      copy : bool, default False
          If True, return a copy of the combined index.
  
      Returns
      -------
      Index
      """
      # TODO: handle index names!
      indexes = _get_distinct_objs(indexes)
      if len(indexes) == 0:
          index = Index([])
      elif len(indexes) == 1:
          index = indexes[0]
      elif intersect:
          index = indexes[0]
          for other in indexes[1:]:
              index = index.intersection(other)
      else:
          index = union_indexes(indexes, sort=False)
          index = ensure_index(index)
  
      if sort:
          index = safe_sort_index(index)
      # GH 29879
      if copy:
          index = index.copy()
  
      return index
  
imports: from __future__ import annotations
  import textwrap
  from typing import cast
  import numpy
  from pandas._libs import NaT, lib
  from pandas._typing import Axis
  from pandas.errors import InvalidIndexError
  from pandas.core.dtypes.cast import find_common_type
  from pandas.core.algorithms import safe_sort
  from pandas.core.indexes.base import Index, _new_Index, ensure_index, ensure_index_from_sequences, get_unanimous_names
  from pandas.core.indexes.category import CategoricalIndex
  from pandas.core.indexes.datetimes import DatetimeIndex
  from pandas.core.indexes.interval import IntervalIndex
  from pandas.core.indexes.multi import MultiIndex
  from pandas.core.indexes.period import PeriodIndex
  from pandas.core.indexes.range import RangeIndex
  from pandas.core.indexes.timedeltas import TimedeltaIndex
label_desc: Use image node_id 3 for calling a global function with example usage: _get_combined_index(indexes, intersect, sort, copy) and returns: index