code: def send_func(self, src_feat, dst_feat, edge_feat):
      return src_feat["node_feat"]
  
imports: import os
  import re
  import time
  from random import random
  from functools import reduce, partial
  import numpy
  import multiprocessing
  import paddle
  import paddle.fluid
  import paddle.fluid
  import paddle.fluid.layers
  from pgl.graph_wrapper import GraphWrapper
  from pgl.layers.conv import gcn, gat
  from pgl.utils import paddle_helper
label_desc: Use image node_id 6 for calling the GraphSageModel obj's underlying member method code with example usage: obj.send_func(src_feat, dst_feat, edge_feat) and returns: src_feat