code: def test_with_featuretools_nan(self, es):
      log_df = es["log"]
      comments = log_df["comments"]
      comments[1] = pd.NA
      comments[2] = np.nan
      comments[3] = None
      log_df["comments"] = comments
      es.replace_dataframe(dataframe_name="log", df=log_df)
  
      transform, aggregation = find_applicable_primitives(
          self.primitive
      )
      primitive_instance = self.primitive(
          "the",
          ignore_case=True,
          ignore_non_alphanumeric=False,
          is_regex=False,
          match_whole_words_only=False,
      )
      transform.append(primitive_instance)
      valid_dfs(es, aggregation, transform, self.primitive)
  
imports: import numpy
  import pandas
  from featuretools.primitives import CountString
  from featuretools.tests.primitive_tests.utils import PrimitiveTestBase, find_applicable_primitives, valid_dfs
label_desc: Use image node_id 16 for calling the TestCountString obj's underlying member method code with example usage: obj.test_with_featuretools_nan(es) without return types