export declare class FlashStoreSync<K = any, V = any> implements Map<K, V> {
    workdir?: string | undefined;
    static VERSION: string;
    private cacheMap;
    private flashStore;
    private asyncBusyState;
    private asyncBusyDict;
    constructor(workdir?: string | undefined);
    private loadStoreToCache;
    private asyncBusyAdd;
    version(): string;
    /**
     *
     * Async methods:
     *
     */
    close(): Promise<void>;
    destroy(): Promise<void>;
    ready(): Promise<void>;
    /*******************************************************
     *
     *
     * The following methods is all for ES6 Map Interface
     *
     *
     *******************************************************/
    get size(): number;
    get [Symbol.toStringTag](): "Map";
    [Symbol.iterator](): IterableIterator<[K, V]>;
    entries(): IterableIterator<[K, V]>;
    keys(): IterableIterator<K>;
    values(): IterableIterator<V>;
    clear(): void;
    delete(key: K): boolean;
    /**
     * Do not mutate the key/value in the forEach loop!
     */
    forEach(callbackfn: (value: V, key: K, map: Map<K, V>) => void, thisArg?: any): void;
    get(key: K): V | undefined;
    has(key: K): boolean;
    set(key: K, value: V): this;
}
export default FlashStoreSync;