import MessagingSessionObserver from '../messagingsessionobserver/MessagingSessionObserver' ; export default interface MessagingSession { /**
     * Start a messaging session.
     */ start ( ) : void ; /**
     * Stop a messaging session.
     */ stop ( ) : void ; /**
     * Add an observer.
     */ addObserver ( observer ) : void ; /**
     * Remove an observer.
     */ removeObserver ( observer ) : void ; /**
     * Iterates through each observer, so that their notification functions may
     * be called.
     */ forEachObserver ( observerFunc ) : void ; }