code: def forward(self, g, in_feat):
      h = self.conv1(g, in_feat)
      h = F.relu(h)
      h = self.conv2(g, h)
      return h
  
file_path: dgl/tutorials/blitz/1_introduction.py
imports: import os
  import dgl
  import dgl.data
  import torch
  import torch.nn
  import torch.nn.functional
  from dgl.nn import GraphConv
label_desc: Use image node_id 2 for calling the GCN obj's underlying member method code with example usage: obj.forward(g, in_feat) and returns: h