code: def test_convert_image_output(self):  # type: () -> None
      coreml_model = convert(
          self.onnx_model, image_output_names=self.output_names
      )
      spec = coreml_model.get_spec()
      for output in spec.description.output:
          self.assertEqual(output.type.WhichOneof("Type"), "imageType")
  
file_path: turicreate/src/external/coremltools_wrap/coremltools/coremltools/converters/onnx/_tests/test_convert.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  from coremltools._deps import _HAS_ONNX, MSG_ONNX_NOT_FOUND, _IS_MACOS
  import unittest
  import numpy
  import numpy.testing
  import numpy.random
  from PIL import Image
label_desc: Use image node_id 3 for calling the ConvertTest obj's underlying member method code with example usage: obj.test_convert_image_output() without return types