message: [TF:TRT] Fix a python test.
  For TF2, TRTEngineOp nodes should only exist inside functions for
  signatures. Avoid looking for TRTEngineOp nodes outside functions.
diff: @@ -865,9 +865,7 @@ class TfTrtIntegrationTestBase(test_util.TensorFlowTestCase):
  return
  expected_engines = self.ExpectedEnginesToBuild(run_params)
  all_op_names = [node.name for node in gdef_to_verify.node]
  - trt_op_names = [
  - node.name for node in gdef_to_verify.node if node.op == "TRTEngineOp"
  - ]
  + trt_op_names = []
  for func in gdef_to_verify.library.function:
  if not re.search(r"TRTEngineOp_\d+_\d+_native_segment",
  func.signature.name):
  