code: def tab_delimited_csv_text(self):
      return normalize_text(
          """
              name\tamount
              Alice\t100
              Bob\t-200
              Charlie\t300
              """
      )
  
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 4 for calling the CsvTestsMixin obj's underlying member method code with example usage: obj.tab_delimited_csv_text() and returns: normalize_text