code: def setUpClass(cls):
      env_config_path = os.path.abspath(
          os.path.join(
              os.path.dirname(__file__), "..", "..", "..", ".env"
          )
      )
      load_dotenv(env_config_path)
  
      cls.model_paths = ["xlnet-base-cased", "gpt2", "distilgpt2"]
  
      cls.text = "The quick brown fox jumps over the lazy dog."
  
file_path: nlpaug/test/augmenter/sentence/test_sentence.py
imports: import unittest
  import os
  from dotenv import load_dotenv
  import nlpaug.augmenter.sentence
  from nlpaug.util import Action, Doc
label_desc: Use image node_id 1 for calling the TestSentence obj's underlying member method code with example usage: obj.setUpClass(cls) without return types