public void HandleImageViewerStateRequest(LitePeer peer, ImageViewerStateRequest req, OperationRequest operationRequest, SendParameters sendParameters) { var state = _doc.GetImageViewer(req.ImageAttachmentId); if (state != null) { _room.PublishEventToSingle(peer, state.ToDict(), sendParameters, (byte)DiscussionEventCode.ImageViewerManipulatedEvent); } }