code: def dataset_with_empty_string():
      return TextData(raw_text=[""])
  
file_path: deepchecks/tests/nlp/checks/data_integrity/frequent_substrings_test.py
imports: import pytest
  from hamcrest import *
  from deepchecks.nlp.checks.data_integrity.frequent_substrings import FrequentSubstrings
  from deepchecks.nlp.text_data import TextData
  from tests.base.utils import equal_condition_result
label_desc: Use image node_id 4 for calling a global function with example usage: dataset_with_empty_string() and returns: TextData