code: def pdf1(self):
      return pd.DataFrame(
          {"a": [1, 2, 3, 4, 5, 6, 7, 8, 9, 15, 50]},
          index=[0, 1, 3, 5, 6, 8, 9, 9, 9, 10, 10],
      )
  
file_path: spark/python/pyspark/pandas/tests/plot/test_series_plot.py
imports: import unittest
  import pandas
  import numpy
  from pyspark import pandas
  from pyspark.pandas.plot import PandasOnSparkPlotAccessor, BoxPlotBase
  from pyspark.testing.pandasutils import have_plotly, plotly_requirement_message
label_desc: Use image node_id 1 for calling the SeriesPlotTestsMixin obj's underlying member method code with example usage: obj.pdf1() and returns: pd