code: def __init__(self, layer, in_size, ch, out_size, stride=2, groups=1):
      super(Block, self).__init__()
      self.add_link(BottleNeckA(in_size, ch, out_size, stride, groups))
      for i in range(layer - 1):
          self.add_link(BottleNeckB(out_size, ch, groups))
  
imports: import chainer
  import chainer.functions
  from chainer import initializers
  import chainer.links
label_desc: Use image node_id 1 to create a new Block object from inherited base classes: chainer with example: obj = Block(layer, in_size, ch, out_size, stride, groups)