code: def test_nonlocal_symbol(self):
      nonlocal_a = 3
      nonlocal_b = 13
  
      def test_fn(c):
          nonlocal nonlocal_a
          nonlocal nonlocal_b
          if nonlocal_a:
              nonlocal_b = c
          else:
              nonlocal_b = c
          return nonlocal_b
  
      node = self._parse_and_analyze(test_fn)
      fn_body = node.body
      self.assertHasLiveOut(fn_body[2], ("nonlocal_b",))
      self.assertHasLiveIn(fn_body[2], ("nonlocal_a", "c"))
  
imports: from tensorflow.python.autograph.pyct import anno
  from tensorflow.python.autograph.pyct import cfg
  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 liveness
  from tensorflow.python.autograph.pyct.static_analysis import reaching_fndefs
  from tensorflow.python.platform import test
label_desc: Use image node_id 33 for calling the LivenessAnalyzerTest obj's underlying member method code with example usage: obj.test_nonlocal_symbol() and returns: nonlocal_b