/**
 * Session Utils
 *
 * @export
 * @abstract
 * @class SessionUtils
 */
export declare abstract class SessionUtils {
    /**
     * Get anonymous from cookies or return a new one.
     *
     * @static
     * @return {string} Anonymous
     * @memberof SessionUtils
     */
    static getAnonymous(): string;
    /**
     * Get session from cookies or return a new one.
     *
     * @static
     * @return {string} Session
     * @memberof SessionUtils
     */
    static getSession(): string;
    /**
     * Get variant from cookies or requests a new one.
     *
     * @static
     * @param {string} userId
     * @return {string} Session
     * @memberof SessionUtils
     */
    static getVariant(userId: string): Promise<string>;
    /**
     * Checks if current session is a new one.
     *
     * @static
     * @return {boolean} True on new session.
     * @memberof SessionUtils
     */
    static isNewSession(): boolean;
}