code: def send_recv(self, edge_index, feature, pool_type="sum"):
      src, dst = edge_index[:, 0], edge_index[:, 1]
      return paddle.geometric.send_u_recv(
          feature, src, dst, pool_type=pool_type
      )
  
file_path: PGL/examples/gnn_depoly/models/base_conv.py
imports: import pdb
  import paddle
  import paddle.nn
  from pgl.utils import op
  from pgl.message import Message
  from pgl.utils.helper import unique_segment
label_desc: Use image node_id 2 for calling the BaseConv obj's underlying member method code with example usage: obj.send_recv(edge_index, feature, pool_type) and returns: paddle