     }
     
     func createAck() -> String {
-        var msg:String
+        let msg:String
         
         if type == PacketType.ACK {
             if nsp == "/" {

        }
    }
    
    private static func findType(binCount:Int, ack:Bool) -> PacketType {
        switch binCount {
        case 0 where !ack:

        self.type = type
        self.placeholders = placeholders
        self.binary = binary
    }
    
    mutating func addData(data:NSData) -> Bool {
