code: def __init__(self, channels, stride=1, skip_by_conv=True):
      self.conv1 = ConvBn(
          channels // 4, 1, 1, act=lambda x: F.relu(x, inplace=True)
      )
      self.conv2 = ConvBn(
          channels // 4,
          3,
          stride,
          act=lambda x: F.relu(x, inplace=True),
      )
      self.conv3 = ConvBn(channels, 1)
      self.skip_by_conv = skip_by_conv
      self.skip = ConvBn(channels, 1, stride)
  
file_path: nnabla/python/src/nnabla/core/modules.py
imports: from __future__ import absolute_import
  import nnabla.functions
  import nnabla.parametric_functions
  from nnabla.core.module import Module
label_desc: Use image node_id 1 to create a new ResUnit object from inherited base classes: Module with example: obj = ResUnit(channels, stride, skip_by_conv)