docs: def merge_data_and_coords(data, coords, compat='broadcast_equals',
                            join='outer'):
      """Used in Dataset.__init__."""
      objs = [data, coords]
      explicit_coords = coords.keys()
      indexes = dict(extract_indexes(coords))
      return merge_core(objs, compat, join, explicit_coords=explicit_coords,
                        indexes=indexes)