code: def forward(self, features, A):
      x = paddle.bmm(A, features)
      return x
  
file_path: PaddleOCR/ppocr/modeling/heads/gcn.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import paddle
  import paddle.nn
  import paddle.nn.functional
label_desc: Use image node_id 1 for calling the MeanAggregator obj's underlying member method code with example usage: obj.forward(features, A) and returns: x