code: def pdf2(self):
      np.random.seed(22)
      dates = [
          datetime.datetime(2022, 5, 1, 4, 5, 6),
          datetime.datetime(2022, 5, 3),
          datetime.datetime(2022, 5, 3, 23, 59, 59),
          datetime.datetime(2022, 5, 4),
          pd.NaT,
          datetime.datetime(2022, 5, 4, 0, 0, 1),
          datetime.datetime(2022, 5, 11),
      ]
      return pd.DataFrame(
          np.random.rand(len(dates), 2),
          index=pd.DatetimeIndex(dates),
          columns=list("AB"),
      )
  
imports: import unittest
  import datetime
  import numpy
  import pandas
  from pyspark import pandas
  from pyspark.testing.pandasutils import PandasOnSparkTestCase, TestUtils
label_desc: Use image node_id 2 for calling the ResampleSeriesMixin obj's underlying member method code with example usage: obj.pdf2() and returns: pd