code: def get_model(self):
      class Model(chainer.Chain):
          def __init__(self):
              super(Model, self).__init__()
              with self.init_scope():
                  self.prelu = L.PReLU()
  
          def __call__(self, x, y, z):
              return F.relu(x) + self.prelu(y) * z
  
      return Model()
  
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 1 for calling the TestMultipleInputs obj's underlying member method code with example usage: obj.get_model() and returns: Model, unknown