private function someMethod():void
     {
         // Add a listener to the invitation reply
         sfs.addEventListener(SFSEvent.INVITATION_REPLY, onInvitationReply);
         
         // Choose the invitation recipients
         var friend1:User = sfs.userManager.getUserByName("Piggy");
         var friend2:User = sfs.userManager.getUserByName("Gonzo");
         
         // Set the custom invitation details
         var params:ISFSObject = new SFSObject();
         params.putUtfString("msg", "Would you like to join me in my private room?");
         params.putUtfString("roomName", "Kermit's room");
         params.putUtfString("roomPwd", "drowssap");
         
         // Send the invitation; recipients have 20 seconds to reply before the invitation expires
         sfs.send(new InviteUsersRequest([friend1, friend2], 20, params));
     }
     
     private function onInvitationReply(evt:SFSEvent):void
     {
         // If at least one recipient accepted the invitation, make me join my private Room to meet him there
         if (evt.params.reply == InvitationReply.ACCEPT)
         {
             var currentRoom:Room = sfs.lastJoinedRoom;
             
             if (currentRoom.name != "Kermit's room")
                 sfs.send(new JoinRoomRequest("Kermit's room"));
         }
         else
         {
             trace(evt.params.invitee + " refused the invitation")
         }
     }