code: def test_unsupported_ops(self):  # type: () -> None
      onnx_model = _make_model_acos_exp_topk()
      coreml_model = convert(onnx_model, add_custom_layers=True)
  
      spec = coreml_model.get_spec()
      layers = spec.neuralNetwork.layers
      self.assertIsNotNone(layers[0].custom)
      self.assertIsNotNone(layers[2].custom)
      self.assertEqual("Acos", layers[0].custom.className)
      self.assertEqual("TopK", layers[2].custom.className)
  
file_path: turicreate/src/external/coremltools_wrap/coremltools/coremltools/converters/onnx/_tests/test_custom_layers.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import unittest
  from coremltools._deps import _HAS_ONNX, MSG_ONNX_NOT_FOUND
  from coremltools.proto import NeuralNetwork_pb2
label_desc: Use image node_id 1 for calling the CustomLayerTest obj's underlying member method code with example usage: obj.test_unsupported_ops() without return types