code: def data_keys(self) -> Dict[str, Set["DataIndexKey"]]:
      by_workspace: Dict[str, Set["DataIndexKey"]] = defaultdict(set)
  
      by_workspace["repo"] = set()
      by_workspace["local"] = set()
  
      for out in self.outs:
          if not out.use_cache:
              continue
  
          workspace, key = out.index_key
          by_workspace[workspace].add(key)
  
      return dict(by_workspace)
  
imports: import logging
  import time
  from collections import defaultdict
  from functools import partial
  from itertools import chain
  from typing import TYPE_CHECKING, Any, Callable, Dict, Iterable, Iterator, List, NamedTuple, Optional, Set, Tuple, Union
  from funcy.debug import format_time
  from dvc.dependency import ParamsDependency
  from dvc.fs import LocalFileSystem
  from dvc.fs.callbacks import DEFAULT_CALLBACK
  from dvc.log import logger
  from dvc.utils.objects import cached_property
label_desc: Use image node_id 19 for calling the Index obj's underlying member method code with example usage: obj.data_keys() and returns: dict