             let data = JSON(command.arguments[0]);
             let autoPlay = data["autoPlay"].bool ?? false
             
-            self.bufferredTracksJsonArray.append(data)
+            self.bufferredTracksJsonArray!.append(data)
             self.doBuffer(playIndex: 0)
             //self.doAddItem(data);
 

    var callbackId: String? = nil
    var errorCallbackId: String? = nil
    var autoLoopPlaylist: Bool = false
    var bufferredTracksJsonArray: [JSON] = []
    var lastBufferedIndex: Int = -1

    @objc(initAudio:)

            self.jukebox.stop();
            self.jukebox.removeAllItems();
            self.jukebox = nil
            self.bufferredTracksJsonArray!.removeAll()
            self.lastBufferedIndex = -1

            self.jukebox = Jukebox(delegate: self, items: [])!
