code: def build_abs(self):
      for m in self.sublayers():
          if isinstance(m, Attention):
              m.build_ab()
  
imports: import itertools
  import paddle
  from paddle import nn
  from paddle.nn import functional
  from .common import LayerNorm2d
label_desc: Use image node_id 3 for calling the TinyViT obj's underlying member method code with example usage: obj.build_abs() without return types