code: def test_boxplot_legacy1(self, hist_df):
      grouped = hist_df.groupby(by="gender")
      with tm.assert_produces_warning(
          UserWarning, check_stacklevel=False
      ):
          axes = _check_plot_works(grouped.boxplot, return_type="axes")
      _check_axes_shape(list(axes.values), axes_num=2, layout=(1, 2))
  
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 1 for calling the TestDataFrameGroupByPlots obj's underlying member method code with example usage: obj.test_boxplot_legacy1(hist_df) without return types