code: def assertHasDefs(self, node, num):
      defs = anno.getanno(node, anno.Static.DEFINITIONS)
      self.assertEqual(len(defs), num)
      for r in defs:
          self.assertIsInstance(r, reaching_definitions.Definition)
  
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 reaching_definitions
  from tensorflow.python.platform import test
label_desc: Use image node_id 2 for calling the ReachingDefinitionsAnalyzerTestBase obj's underlying member method code with example usage: obj.assertHasDefs(node, num) without return types