code: def copy_send(src_feat, dst_feat, edge_feat):
      return src_feat["h"]
  
imports: from __future__ import division
  from __future__ import absolute_import
  from __future__ import print_function
  from __future__ import unicode_literals
  import math
  import pgl
  import numpy
  import paddle
  import paddle.fluid.layers
  import paddle.fluid
  import paddle.fluid
label_desc: Use image node_id 1 for calling a global function with example usage: copy_send(src_feat, dst_feat, edge_feat) and returns: src_feat