docstr: check whether there are processed data in `self.save_path`
docstr_tok: ["check","whether","there","are","processed","data","in","`","self.save_path","`"]
code: def has_cache(self):
      """check whether there are processed data in `self.save_path`"""
      return os.path.exists(self.graph_path)
  
file_path: dgl/examples/pytorch/gas/dataloader.py
imports: import os
  import dgl
  import numpy
  import scipy.io
  import torch
  from dgl.data import DGLBuiltinDataset
  from dgl.data.utils import _get_dgl_url, load_graphs, save_graphs
label_desc: Use image node_id 5 for calling the GASDataset obj's underlying member method code with example usage: obj.has_cache() and returns: os