code: def test_basic(self):
      def test_function():
          a = 0
          return a
  
      node, _ = parser.parse_entity(test_function, future_features=())
      node = anf.transform(node, self._simple_context())
      result, _, _ = loader.load_ast(node)
      self.assertEqual(test_function(), result.test_function())
  
imports: import textwrap
  import gast
  from tensorflow.python.autograph.pyct import loader
  from tensorflow.python.autograph.pyct import parser
  from tensorflow.python.autograph.pyct import transformer
  from tensorflow.python.autograph.pyct.common_transformers import anf
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the AnfTransformerTest obj's underlying member method code with example usage: obj.test_basic() and returns: a