code: def edge_index_dict(
      self,
  ) -> Dict[Tuple[str, str, str], Dict[str, torch.Tensor]]:
      raise NotImplementedError()
  
file_path: cugraph/benchmarks/cugraph/standalone/bulk_sampling/datasets/dataset.py
imports: import torch
  from typing import Dict, Tuple
label_desc: Use image node_id 1 for calling the Dataset obj's underlying member method code with example usage: obj.edge_index_dict() without return types