code: def test_union_multiindex_empty_rangeindex():
      # GH#41234
      mi = MultiIndex.from_arrays([[1, 2], [3, 4]], names=["a", "b"])
      ri = pd.RangeIndex(0)
  
      result_left = mi.union(ri)
      tm.assert_index_equal(mi, result_left, check_names=False)
  
      result_right = ri.union(mi)
      tm.assert_index_equal(mi, result_right, check_names=False)
  
imports: import numpy
  import pytest
  import pandas
  from pandas import CategoricalIndex, DataFrame, Index, IntervalIndex, MultiIndex, Series
  import pandas._testing
  from pandas.api.types import is_float_dtype, is_unsigned_integer_dtype
label_desc: Use image node_id 26 for calling a global function with example usage: test_union_multiindex_empty_rangeindex() without return types