code: def __init__(self):
      self.conv_bn_1 = ConvBn(1)
      self.conv_bn_2 = ConvBn(1)
  
imports: import os
  import io
  import pytest
  import numpy
  import nnabla
  import nnabla.functions
  import nnabla.parametric_functions
  from collections import OrderedDict
  from nnabla.testing import assert_allclose
  from nnabla.core.modules import ConvBn, ResUnit
  from helper import ModuleCreator, forward_variable_and_check_equal, create_temp_with_dir
label_desc: Use image node_id 1 to create a new TSTNetNormal object from inherited base classes: nn with example: obj = TSTNetNormal()