import MessagingSessionObserver from '../messagingsessionobserver/MessagingSessionObserver';
export default interface MessagingSession {
    /**
     * Start a messaging session. This promise is fulfilled when messaging session is established successfully.
     * Promise is rejected when there are errors in communicating to messaging endpoint or connection is Unauthorized.
     */
    start(): Promise<void>;
    /**
     * Stop a messaging session.
     */
    stop(): void;
    /**
     * Add an observer.
     */
    addObserver(observer: MessagingSessionObserver): void;
    /**
     * Remove an observer.
     */
    removeObserver(observer: MessagingSessionObserver): void;
    /**
     * Iterates through each observer, so that their notification functions may
     * be called.
     */
    forEachObserver(observerFunc: (observer: MessagingSessionObserver) => void): void;
}