diff --git a/session/packetVisitors.go b/session/packetVisitors.go
index 620a89b..cf59deb 100644
--- a/session/packetVisitors.go
+++ b/session/packetVisitors.go
@@ -76,18 +76,20 @@ func (s *Session) VisitPing(p packets.PingreqPacket) {
 	s.Connection.sendPacket(packets.PingrespPacket{})
 }
 
+
+//TODO implement QoSLevel 2
 func (s *Session) VisitPubackPacket(_ packets.PubackPacket) {
-	panic("not implemented") // TODO: Implement
+	panic("not implemented") 
 }
 
 func (s *Session) VisitPubrecPacket(_ packets.PubrecPacket) {
-	panic("not implemented") // TODO: Implement
+	panic("not implemented") 
 }
 
 func (s *Session) VisitPubrelPacket(_ packets.PubrelPacket) {
-	panic("not implemented") // TODO: Implement
+	panic("not implemented") 
 }
 
 func (s *Session) VisitPubcompPacket(_ packets.PubcompPacket) {
-	panic("not implemented") // TODO: Implement
+	panic("not implemented") 
 }