code: def test_live_in_pass(self):
      def test_fn(x, a, b, c):  # pylint:disable=unused-argument
          if a > 0:
              pass
          return x
  
      node = self._parse_and_analyze(test_fn)
      fn_body = node.body
  
      self.assertHasLiveIn(fn_body[0], ("a", "x"))
      self.assertHasLiveIn(fn_body[0].body[0], ("x",))
      self.assertHasLiveIn(fn_body[1], ("x",))
  
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 15 for calling the LivenessAnalyzerTest obj's underlying member method code with example usage: obj.test_live_in_pass() and returns: x