class_docstr: Cache for model outputs.
docstr: Print some info, for logging.
code: def info(self) -> str:
      """Print some info, for logging."""
      return str(len(self._d))
  
imports: from collections.abc import Callable, Iterable
  import os
  import pickle
  import threading
  from typing import Any, Optional, Union
  from absl import logging
  from lit_nlp.api import dataset
  from lit_nlp.api import model
  from lit_nlp.api import types
  from lit_nlp.lib import serialize
label_desc: Use image node_id 5 for calling the PredsCache obj's underlying member method code with example usage: obj.info() and returns: str