class_docstr: A dictionary that maintains up to :maxsize: key-value-expiration tuples until their expiration_time
class_docstr_tok: ["A","dictionary","that","maintains","up","to",":","maxsize",":","key-value-expiration","tuples","until","their","expiration_time"]
code: def __len__(self):
      self._remove_outdated()
      return len(self.data)
  
imports: from __future__ import annotations
  import heapq
  import time
  from contextlib import contextmanager
  from dataclasses import dataclass
  from typing import Dict, Generic, Iterator, List, Optional, Tuple, TypeVar
label_desc: Use image node_id 9 for calling the TimedStorage obj's underlying member method code with example usage: obj.__len__() and returns: len