code: def test_boxplot_legacy2(self):
      df = DataFrame(
          np.random.default_rng(2).random((10, 2)),
          columns=["Col1", "Col2"],
      )
      df["X"] = Series(
          ["A", "A", "A", "A", "A", "B", "B", "B", "B", "B"]
      )
      df["Y"] = Series(["A"] * 10)
      with tm.assert_produces_warning(
          UserWarning, check_stacklevel=False
      ):
          _check_plot_works(df.boxplot, by="X")
  
imports: import itertools
  import string
  import numpy
  import pytest
  from pandas import DataFrame, MultiIndex, Series, date_range, plotting, timedelta_range
  import pandas._testing
  from pandas.tests.plotting.common import _check_axes_shape, _check_box_return_type, _check_plot_works, _check_ticks_props, _check_visible
  from pandas.io.formats.printing import pprint_thing
label_desc: Use image node_id 4 for calling the TestDataFramePlots obj's underlying member method code with example usage: obj.test_boxplot_legacy2() without return types