code: def test_mnist(self):
      # eval() is present because dropout makes this nondeterministic
      self.checkExportImport(
          MnistNet().eval(), (torch.rand(5, 1, 28, 28),)
      )
  
imports: import unittest
  import torch
  import torch.nn.functional
  import torchvision
  import nni.nas.nn.pytorch.layers
  from nni.nas.nn.pytorch import ParametrizedModule
  from .convert_mixin import ConvertMixin, ConvertWithShapeMixin
label_desc: Use image node_id 3 for calling the TestConvert obj's underlying member method code with example usage: obj.test_mnist() without return types