code: def forward(self, x_dict, edge_index_dict):
      return self.model(x_dict, edge_index_dict)
  
file_path: pytorch_geometric/benchmark/utils/hetero_sage.py
imports: import torch
  from tqdm import tqdm
  from torch_geometric.nn import GraphSAGE, to_hetero
label_desc: Use image node_id 2 for calling the HeteroGraphSAGE obj's underlying member method code with example usage: obj.forward(x_dict, edge_index_dict) and returns: self