code: def test_imports(self):
      """End-to-end test of model_train script."""
      # Test various imports work
      # pylint: disable=unused-variable
      # pylint: disable=g-import-not-at-top
      import enum
      import intervaltree
      import contextlib2
  
label_desc: Use image node_id 1 for calling the EnvironmentSmokeTest obj's underlying member method code with example usage: obj.test_imports() without return types