public SendPrivateMessageEventHandler(
     IPrivateMessageSenderSideManager manager,
     IExternalUserLookupServiceProvider externalUserLookupServiceProvider)
 {
     _manager = manager;
     _externalUserLookupServiceProvider = externalUserLookupServiceProvider;
 }
 public PrivateMessageAppService(
     IDataFilter dataFilter,
     IExternalUserLookupServiceProvider externalUserLookupServiceProvider,
     IPrivateMessageRepository privateMessageRepository,
     IPrivateMessageNotificationManager notificationManager,
     IPrivateMessageSenderSideManager privateMessageSenderSideManager,
     IPrivateMessageReceiverSideManager privateMessageReceiverSideManager)
 {
     _dataFilter = dataFilter;
     _externalUserLookupServiceProvider = externalUserLookupServiceProvider;
     _privateMessageRepository          = privateMessageRepository;
     _notificationManager               = notificationManager;
     _privateMessageSenderSideManager   = privateMessageSenderSideManager;
     _privateMessageReceiverSideManager = privateMessageReceiverSideManager;
 }