code: def test_concat_rename_index(self):
      a = DataFrame(
          np.random.default_rng(2).random((3, 3)),
          columns=list("ABC"),
          index=Index(list("abc"), name="index_a"),
      )
      b = DataFrame(
          np.random.default_rng(2).random((3, 3)),
          columns=list("ABC"),
          index=Index(list("abc"), name="index_b"),
      )
  
      result = concat(
          [a, b], keys=["key0", "key1"], names=["lvl0", "lvl1"]
      )
  
      exp = concat([a, b], keys=["key0", "key1"], names=["lvl0"])
      names = list(exp.index.names)
      names[1] = "lvl1"
      exp.index.set_names(names, inplace=True)
  
      tm.assert_frame_equal(result, exp)
      assert result.index.names == exp.index.names
  
imports: from copy import deepcopy
  import numpy
  import pytest
  from pandas.errors import PerformanceWarning
  import pandas
  from pandas import DataFrame, Index, MultiIndex, Series, concat
  import pandas._testing
label_desc: Use image node_id 3 for calling the TestIndexConcat obj's underlying member method code with example usage: obj.test_concat_rename_index() without return types