code: def _get_combined_index(indexes, intersect=False, sort=False):
      
  
      # 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=sort)
          index = ensure_index(index)
  
      if sort:
          try:
              index = index.sort_values()
          except TypeError:
              pass
      return index
docs: 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.
  
      Returns
      -------
      Index