code: def test_get_external_persistor():
      p = persistor.get_persistor(
          "tests.nlu.test_persistor.TestPersistor"
      )
      assert isinstance(p, TestPersistor)
  
file_path: rasa/tests/nlu/test_persistor.py
imports: from typing import Text
  import pytest
  from unittest.mock import patch
  from moto import mock_s3
  from rasa.nlu import persistor
  from rasa.nlu.persistor import Persistor
label_desc: Use image node_id 3 for calling a global function with example usage: test_get_external_persistor() without return types