export declare class PreferenceStore {
    private dir;
    private file;
    constructor(dir: string, filename?: string);
    private _store?;
    private get store();
    private set store(value);
    write(): void;
    clear(): void;
    delete(key: string): boolean;
    get(key: string): any;
    has(key: string): boolean;
    set(key: string, value: any): void;
    getAll(): Record<string, any>;
}