code: def assertHasLiveIn(self, node, expected):
      live_in = anno.getanno(node, anno.Static.LIVE_VARS_IN)
      live_in_strs = set(str(v) for v in live_in)
      if not expected:
          expected = ()
      if not isinstance(expected, tuple):
          expected = (expected,)
      self.assertSetEqual(live_in_strs, set(expected))
  
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 3 for calling the LivenessAnalyzerTestBase obj's underlying member method code with example usage: obj.assertHasLiveIn(node, expected) without return types