code: def csv_text_2(self):
      return normalize_text(
          """
              A,B
              item1,1
              item2,1,2
              item3,1,2,3,4
              item4,1
              """
      )
  
imports: import os
  from contextlib import contextmanager
  import pandas
  import numpy
  from pyspark import pandas
  from pyspark.testing.pandasutils import PandasOnSparkTestCase, TestUtils
label_desc: Use image node_id 2 for calling the CsvTestsMixin obj's underlying member method code with example usage: obj.csv_text_2() and returns: normalize_text