class_docstr: Very simple cache that discards the oldest item when the cache size is
  exceeded.
  
  :param maxsize: Maximum size of the cache. (Don't make it too big.)
docstr: Clear cache.
docstr_tok: ["Clear","cache","."]
code: def clear(self) -> None:
      "Clear cache."
      self._data = {}
      self._keys = deque()
  
file_path: catboost/contrib/python/prompt-toolkit/py3/prompt_toolkit/cache.py
imports: from __future__ import annotations
  from collections import deque
  from functools import wraps
  from typing import Any, Callable, Dict, Generic, Hashable, Tuple, TypeVar, cast
label_desc: Use image node_id 3 for calling the SimpleCache obj's underlying member method code with example usage: obj.clear() without return types