code: def forward(self, node):
      dic = self.update_zm(node)
      dic.update(self.update_r(node, zm=dic))
      return dic
  
file_path: dgl/examples/pytorch/jtnn/jtnn/nnutils.py
imports: import os
  import dgl
  import torch
  import torch.nn
label_desc: Use image node_id 4 for calling the GRUUpdate obj's underlying member method code with example usage: obj.forward(node) and returns: dic