code: def attention(self, x):
      x = self.attn(x, self.attn_mask)
      assert isinstance(x, paddle.Tensor)  # not tuble here
      return x
  
imports: from typing import Optional
  import paddle
  import paddle.nn
  from paddle import Tensor
  from paddle.nn import functional
  from paddle.nn import Linear
label_desc: Use image node_id 2 for calling the ResidualAttentionBlock obj's underlying member method code with example usage: obj.attention(x) and returns: x