             systemName: "music.note", action: #selector(didTapLibraryButton), style: .body)
         let cloudButton = createButton(
             systemName: "icloud.fill", action: #selector(didTapCloudButton), style: .body)
-        let listButton = createButton(
+        listButton = createButton(
             systemName: "list.dash", action: #selector(didTapListButton), style: .body)
 
         let routePickerView = AVRoutePickerView()

        didPickMediaItems mediaItemCollection: MPMediaItemCollection)
    {
        mediaController.mediaPlayer = SystemMediaPlayer(queue: mediaItemCollection, delegate: self)
        mediaPicker.dismiss(animated: true) {
            self.mediaController.play()
        }

        }
        mediaController.mediaPlayer = FileMediaPlayer(
            player: player, fileName: fileName, artistName: artistName, delegate: self)
        listButton.isHidden = true
        controller.dismiss(animated: true) {
            self.mediaController.play()
        }
