code: def test_outputs(self):
      model = self.get_model()
      x = np.ones((1, 3), dtype=np.float32)
      self.expect(model, x, output_names=["y", "z"])
  
imports: import unittest
  import chainer
  import chainer.functions
  import chainer.links
  from chainer import testing
  import numpy
  import pytest
  from onnx_chainer import export
  from onnx_chainer.export import RetainInputHook
  from onnx_chainer.testing import input_generator
  from onnx_chainer_tests.helper import ONNXModelTest
label_desc: Use image node_id 2 for calling the TestIntermediateOutput obj's underlying member method code with example usage: obj.test_outputs() without return types