class_docstr: Base Class for GNN Benchmark dataset
  
  Reference: https://github.com/shchur/gnn-benchmark#datasets
class_docstr_tok: ["Base","Class","for","GNN","Benchmark","dataset","Reference",":","https",":","\/\/github.com\/shchur\/gnn-benchmark","#","datasets"]
code: def save(self):
      graph_path = os.path.join(self.save_path, "dgl_graph_v1.bin")
      save_graphs(graph_path, self._graph)
  
imports: import os
  import numpy
  import scipy.sparse
  from ..None import backend, transforms
  from ..convert import graph
  from .dgl_dataset import DGLBuiltinDataset
  from .utils import _get_dgl_url, deprecate_class, deprecate_property, load_graphs, save_graphs
label_desc: Use image node_id 4 for calling the GNNBenchmarkDataset obj's underlying member method code with example usage: obj.save() without return types