code: def _plot(
      self, ax, bxpstats, column_num=None, return_type="axes", **kwds
  ):
      bp = self.boxplot(ax, bxpstats, **kwds)
  
      if return_type == "dict":
          return bp, bp
      elif return_type == "both":
          return self.BP(ax=ax, lines=bp), bp
      else:
          return ax, bp
  
imports: from pyspark.loose_version import LooseVersion
  import matplotlib
  import numpy
  from matplotlib.axes._base import _process_plot_format
  from pandas.core.dtypes.inference import is_list_like
  from pandas.io.formats.printing import pprint_thing
  from pandas.plotting._matplotlib import BarPlot, BoxPlot, HistPlot, PiePlot, AreaPlot, LinePlot, BarhPlot, ScatterPlot, KdePlot
  from pandas.plotting._core import PlotAccessor
  from pandas.plotting._matplotlib.core import MPLPlot
  from pyspark.pandas.plot import TopNPlotBase, SampledPlotBase, HistogramPlotBase, BoxPlotBase, unsupported_function, KdePlotBase
label_desc: Use image node_id 2 for calling the PandasOnSparkBoxPlot obj's underlying member method code with example usage: obj._plot(ax, bxpstats, column_num, return_type) and returns: bp,  bp, self,  bp, ax,  bp