export declare function persistenceUsesUni(): boolean;
export declare const persistenceStorage: {
    getItem(key: string): string | null;
    setItem(key: string, value: string): void;
    removeItem(key: string): void;
    /** 当前端可枚举的全部存储键（调用方需自行按前缀过滤） */
    keys(): string[];
};