Interface that represents messenger events such as typing, markAsRead.
Extends VIMessengerEvent which provides service information (IM user id, action, event type).
@property (strong, readonly, nonatomic)
The conversation UUID associated with this event.
@property (assign, readonly, nonatomic)
The sequence number of the event that was marked as read by the user initiated this event. Only available for VIMessengerEventTypeIsRead.