code: def get_output_nodes(self) -> List[OutputNodes]:
      raise NotImplementedError
  
imports: import logging
  import math
  from typing import Callable, Iterator, List, NamedTuple, Optional, Tuple, Union
  import numpy
  import scipy.sparse
  import torch
  from torch import Tensor
  from tqdm import tqdm
  from torch_geometric.data import Data
  from torch_geometric.typing import SparseTensor
  from torch_geometric.utils import get_ppr, is_undirected, subgraph
label_desc: Use image node_id 2 for calling the _IBMBBaseLoader obj's underlying member method code with example usage: obj.get_output_nodes() without return types