code: def testUnwrapReturnsEmptyArrayForUndecoratedFunction(self):
      decorators, _ = tf_decorator.unwrap(test_function)
      self.assertEqual(0, len(decorators))
  
imports: import functools
  import inspect
  from tensorflow.python.platform import test
  from tensorflow.python.platform import tf_logging
  from tensorflow.python.util import tf_decorator
  from tensorflow.python.util import tf_inspect
label_desc: Use image node_id 1 for calling the TfDecoratorUnwrapTest obj's underlying member method code with example usage: obj.testUnwrapReturnsEmptyArrayForUndecoratedFunction() without return types