code: def test_return_vars_are_read(self):
      def test_fn(a, b, c):  # pylint: disable=unused-argument
          return c
  
      node, _ = self._parse_and_analyze(test_fn)
      fn_node = node
      self.assertScopeIs(
          anno.getanno(fn_node, NodeAnno.BODY_SCOPE), ("c",), ()
      )
      self.assertScopeIs(
          anno.getanno(node.body[0], anno.Static.SCOPE), ("c",), ()
      )
  
imports: import gast
  from tensorflow.python.autograph.pyct import anno
  from tensorflow.python.autograph.pyct import naming
  from tensorflow.python.autograph.pyct import parser
  from tensorflow.python.autograph.pyct import qual_names
  from tensorflow.python.autograph.pyct import transformer
  from tensorflow.python.autograph.pyct.static_analysis import activity
  from tensorflow.python.autograph.pyct.static_analysis import annos
  from tensorflow.python.platform import test
label_desc: Use image node_id 18 for calling the ActivityAnalyzerTest obj's underlying member method code with example usage: obj.test_return_vars_are_read() and returns: c