export interface StorageService {
    getItem<Value>(key: string): Promise<Value | null>;
    getItemSync<Value>(key: string): Value | null;
    setItem<Value>(key: string, value: Value): Promise<void>;
    setItemSync<Value>(key: string, value: Value): void;
    has(key: string): boolean;
    clearItem(key: string): void;
    clear(): void;
}