code: def forward(self, x0, edge_index):
      x1 = self.conv1(x0, edge_index)
      x2 = self.conv2(x1, edge_index)
      return [x1, x2]
  
file_path: pytorch_geometric/test/utils/test_embedding.py
imports: import pytest
  import torch
  from torch_geometric.nn import GCNConv, Linear
  from torch_geometric.utils import get_embeddings
label_desc: Use image node_id 2 for calling the GNN obj's underlying member method code with example usage: obj.forward(x0, edge_index) and returns: list