docstr: local path to save the data 
docstr_tok: ["local","path","to","save","the","data"]
code: def save_path(self):
      """local path to save the data"""
      raise NotImplementedError
  
imports: import os
  import numpy
  import torch.utils.data
  import torchvision.transforms
  import torchvision.datasets
label_desc: Use image node_id 4 for calling the DataProvider obj's underlying member method code with example usage: obj.save_path() without return types