class_docstr: Manages cached values for a single st.cache_resource function.
code: def _clear(self) -> None:
      with self._mem_cache_lock:
          self._mem_cache.clear()
  
imports: from __future__ import annotations
  import math
  import threading
  import types
  from datetime import timedelta
  from typing import Any, Callable, TypeVar, cast, overload
  from cachetools import TTLCache
  from typing_extensions import TypeAlias
  import streamlit
  from streamlit.deprecation_util import show_deprecation_warning
  from streamlit.logger import get_logger
  from streamlit.runtime.caching import cache_utils
  from streamlit.runtime.caching.cache_errors import CacheKeyNotFoundError
  from streamlit.runtime.caching.cache_type import CacheType
  from streamlit.runtime.caching.cache_utils import Cache, CachedFuncInfo, make_cached_func_wrapper, ttl_to_seconds
  from streamlit.runtime.caching.cached_message_replay import CachedMessageReplayContext, CachedResult, ElementMsgData, MsgData, MultiCacheResults
  from streamlit.runtime.caching.hashing import HashFuncsDict
  from streamlit.runtime.metrics_util import gather_metrics
  from streamlit.runtime.scriptrunner.script_run_context import get_script_run_ctx
  from streamlit.runtime.stats import CacheStat, CacheStatsProvider, group_stats
  from streamlit.vendor.pympler.asizeof import asizeof
label_desc: Use image node_id 6 for calling the ResourceCache obj's underlying member method code with example usage: obj._clear() without return types