export interface Storage {
    getItem(key: string): Promise<string>;
    getJson(key: string): Promise<any>;
    setItem(key: string, value: string): Promise<void>;
    setJson(key: string, value: any): Promise<void>;
    removeItem(key: string): Promise<void>;
    clearAll(): Promise<void>;
    getAllKeys(): Promise<string[]>;
    multiRemove(keys: Array<string>): Promise<void>;
}