code: def get_cancers():
      return get_asset(TCGA.folder, "cancers.json", dtype="json")
  
imports: import os
  import json
  import h5py
  import numpy
  import torch
  import copy
  from ordered_set import OrderedSet
  from torchmeta.utils.data import Task, MetaDataset
  from torchmeta.datasets.utils import get_asset
label_desc: Use image node_id 4 for calling a global function with example usage: get_cancers() and returns: get_asset