Interface CloudStorage

interface CloudStorage {
    getItem(
        key: string,
        callback?: (error: Error | null, value: string | null) => void,
    ): void;
    getItems(
        keys: string[],
        callback?: (error: Error | null, values: Record<string, string>) => void,
    ): void;
    removeItem(
        key: string,
        callback?: (error: Error | null, success: boolean) => void,
    ): void;
    removeItems(
        keys: string[],
        callback?: (error: Error | null, success: boolean) => void,
    ): void;
    setItem(
        key: string,
        value: string,
        callback?: (error: Error | null, success: boolean) => void,
    ): void;
}