import { Undefinable } from '@thermopylae/core.declarations';
import { CacheBackend } from '../contracts/cache-backend';
import { CacheEntry } from '../contracts/commons';
/**
 * Backend which uses as underlying storage EcmaScript 6 Map.
 * It can be seen as a simple proxy over Map.
 * Each operation is forwarded to underlying Map instance.
 *
 * @template Key	Type of the *key*.
 * @template Value	Type of the *value*.
 * @template Entry	Type of the cache entry. <br/>
 * 					Defaults to {@link CacheEntry}.
 */
declare class EsMapCacheBackend<Key, Value, Entry extends CacheEntry<Key, Value> = CacheEntry<Key, Value>> implements CacheBackend<Key, Value> {
    private readonly store;
    constructor();
    /**
     * @inheritDoc
     */
    get(key: Key): Undefinable<Entry>;
    /**
     * @inheritDoc
     */
    has(key: Key): boolean;
    /**
     * @inheritDoc
     */
    set(key: Key, value: Value): Entry;
    /**
     * @inheritDoc
     */
    del(entry: Entry): void;
    /**
     * @inheritDoc
     */
    clear(): void;
    /**
     * @inheritDoc
     */
    get size(): number;
    /**
     * @inheritDoc
     */
    [Symbol.iterator](): IterableIterator<[Key, Entry]>;
    /**
     * @inheritDoc
     */
    keys(): IterableIterator<Key>;
    /**
     * @inheritDoc
     */
    values(): IterableIterator<Entry>;
}
export { EsMapCacheBackend };