export declare type WeakCache<T> = WeakMap<object, [WeakCache<T>] | [WeakCache<T>, T]>;
export declare const getWeakCacheItem: <T>(cache: WeakCache<T>, deps: readonly object[]) => T | undefined;
export declare const setWeakCacheItem: <T>(cache: WeakCache<T>, deps: readonly object[], item: T) => void;