code: def message_func(self, edges):
      return {"h": edges.src["h"], "c": edges.src["c"]}
  
file_path: pytorch-struct/examples/networks/TreeLSTM.py
imports: import torch
  import torch
  import torch.nn
  import dgl
  from torch_struct import CKY
label_desc: Use image node_id 2 for calling the TreeLSTMCell obj's underlying member method code with example usage: obj.message_func(edges) and returns: dict