code: def _run_test_case_class(self, cls, prefix, check=False):
      test_loader = unittest.TestLoader()
      test_loader.testMethodPrefix = prefix
      suite = test_loader.loadTestsFromTestCase(cls)
      result = unittest.TextTestRunner().run(suite)
      if check:
          self.assertTrue(result.wasSuccessful())
  
imports: import copy
  import os
  import unittest
  import tensorflow
  from tfx import types
  from tfx.types import standard_artifacts
  from tfx.utils import test_case_utils
label_desc: Use image node_id 2 for calling the TestCaseUtilsTest obj's underlying member method code with example usage: obj._run_test_case_class(cls, prefix, check) without return types