code: def test_grouped_box_return_type_arg_duplcate_cats(self, return_type):
      columns2 = "X B C D A".split()
      df2 = DataFrame(
          np.random.default_rng(2).standard_normal((6, 5)),
          columns=columns2,
      )
      categories2 = "A B".split()
      df2["category"] = categories2 * 3
  
      returned = df2.groupby("category").boxplot(
          return_type=return_type
      )
      _check_box_return_type(
          returned, return_type, expected_keys=categories2
      )
  
      returned = df2.boxplot(by="category", return_type=return_type)
      _check_box_return_type(
          returned, return_type, expected_keys=columns2
      )
  
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 11 for calling the TestDataFrameGroupByPlots obj's underlying member method code with example usage: obj.test_grouped_box_return_type_arg_duplcate_cats(return_type) without return types