code: def forward(self, x, edge_index):
      x = self.conv(x, edge_index)
      x = self.prelu(x)
      return x
  
file_path: pytorch_geometric/examples/infomax_transductive.py
imports: import os.path
  import torch
  from torch_geometric.datasets import Planetoid
  from torch_geometric.nn import DeepGraphInfomax, GCNConv
label_desc: Use image node_id 2 for calling the Encoder obj's underlying member method code with example usage: obj.forward(x, edge_index) and returns: x