code: def test_multiindex_with_datatime_level_preserves_freq(self):
      # https://github.com/pandas-dev/pandas/issues/35563
      idx = Index(range(2), name="A")
      dti = pd.date_range("2020-01-01", periods=7, freq="D", name="B")
      mi = MultiIndex.from_product([idx, dti])
      df = DataFrame(
          np.random.default_rng(2).standard_normal((14, 2)), index=mi
      )
      result = df.loc[0].index
      tm.assert_index_equal(result, dti)
      assert result.freq == dti.freq
  
imports: import numpy
  import pytest
  import pandas._libs.index
  from pandas.errors import PerformanceWarning
  import pandas
  from pandas import CategoricalDtype, DataFrame, Index, MultiIndex, Series
  import pandas._testing
  from pandas.core.arrays.boolean import BooleanDtype
label_desc: Use image node_id 6 for calling the TestMultiIndexBasic obj's underlying member method code with example usage: obj.test_multiindex_with_datatime_level_preserves_freq() without return types