code: def testAOTCompileCPUWrongSignatureDefKey(self):
      if not test.is_built_with_xla():
          self.skipTest("Skipping test because XLA is not compiled in.")
  
      base_path = test.test_src_dir_path(SAVED_MODEL_PATH)
      output_dir = os.path.join(
          test.get_temp_dir(), "aot_compile_cpu_dir"
      )
  
      saved_model_cli.flags.FLAGS.unparse_flags()
      saved_model_cli.flags.FLAGS(
          [
              "saved_model_cli",
              "aot_compile_cpu",
              "--dir",
              base_path,
              "--tag_set",
              "serve",
              "--output_prefix",
              output_dir,
              "--cpp_class",
              "Compiled",
              "--signature_def_key",
              "MISSING",
          ]
      )
      parser = saved_model_cli.create_parser()
      parser.parse_args()
      with self.assertRaisesRegex(
          ValueError, "Unable to find signature_def"
      ):
          saved_model_cli.aot_compile_cpu()
  
imports: import contextlib
  import io
  import os
  import pickle
  import platform
  import shutil
  import sys
  from absl.testing import parameterized
  import numpy
  from tensorflow.core.example import example_pb2
  from tensorflow.core.framework import types_pb2
  from tensorflow.core.protobuf import meta_graph_pb2
  from tensorflow.python.debug.wrappers import local_cli_wrapper
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.lib.io import file_io
  from tensorflow.python.ops import parsing_config
  from tensorflow.python.ops import parsing_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
  from tensorflow.python.platform import tf_logging
  from tensorflow.python.saved_model import save
  from tensorflow.python.tools import saved_model_cli
  from tensorflow.python.trackable import autotrackable
label_desc: Use image node_id 37 for calling the SavedModelCLITestCase obj's underlying member method code with example usage: obj.testAOTCompileCPUWrongSignatureDefKey() without return types