code: def test_subplots_constrained_layout(self):
      # GH 25261
      idx = date_range(start="now", periods=10)
      df = DataFrame(
          np.random.default_rng(2).random((10, 3)), index=idx
      )
      kwargs = {}
      if hasattr(mpl.pyplot.Figure, "get_constrained_layout"):
          kwargs["constrained_layout"] = True
      _, axes = mpl.pyplot.subplots(2, **kwargs)
      with tm.assert_produces_warning(None):
          df.plot(ax=axes[0])
          with tm.ensure_clean(return_filelike=True) as path:
              mpl.pyplot.savefig(path)
  
imports: import string
  import numpy
  import pytest
  from pandas.compat import is_platform_linux
  from pandas.compat.numpy import np_version_gte1p24
  import pandas
  from pandas import DataFrame, Series, date_range
  import pandas._testing
  from pandas.tests.plotting.common import _check_axes_shape, _check_box_return_type, _check_legend_labels, _check_ticks_props, _check_visible, _flatten_visible
  from pandas.io.formats.printing import pprint_thing
label_desc: Use image node_id 30 for calling the TestDataFramePlotsSubplots obj's underlying member method code with example usage: obj.test_subplots_constrained_layout() without return types