export declare const counterSymbol: unique symbol;
export declare const dirpathSymbol: unique symbol;
export declare const asyncStoreSetItemResultsSymbol: unique symbol;
export type AsyncStoreSetItemResult = Promise<void> & {
    hasCancel: boolean;
    hasDone: boolean;
    cancel: () => void;
};
export declare class AsyncStore {
    private [counterSymbol];
    private [dirpathSymbol];
    private [asyncStoreSetItemResultsSymbol];
    private constructor();
    clear(): Promise<void>;
    getItem(key: string): Promise<string | null>;
    getObject<T>(key: string): Promise<T | null>;
    key(index: number): Promise<string | null>;
    keys(): Promise<string[]>;
    length(): Promise<number>;
    removeItem(key: string): Promise<void>;
    setItem(key: string, value: string): AsyncStoreSetItemResult;
    setObject(key: string, value: any): Promise<void>;
    private keyToPath;
    static create(dirpath: string): AsyncStore;
}