code: def forward(self, x, edge_index):
      return self.propagate(edge_index, x=x)
  
imports: import torch
  from torch_geometric.data import Batch, Data
  from torch_geometric.nn import ChebConv, GCNConv, MessagePassing
label_desc: Use image node_id 1 for calling the MyConv obj's underlying member method code with example usage: obj.forward(x, edge_index) and returns: self