export declare enum StorageType {
    SESSION = "session",
    LOCAL = "local"
}
export declare class KlevuStorage {
    static dataProtectedKeys: string[];
    static addKey: (key: string) => void;
    static removeKey: (key: string) => void;
    static listKeys(): string[];
    static getItem: (key: string, storageType?: StorageType) => string | null;
    static setItem: (key: string, value: string, storageType?: StorageType) => void;
    static removeItem: (key: string, storageType?: StorageType) => void;
}