Use of unresolved identifier 'musicLibrary'

  init(index: Int) {
        let musiclibrary = MusicLibrary().library
        let playlistDictionary = musicLibrary[index]

        title = playlistDictionary["title"] as String!
        description = playlistDictionary["description"] as String!

        let iconName = playlistDictionary["icon"] as String!
        icon = UIImage(named: iconName)


        let largeIconName = playlistDictionary["largeIcon"] as String!
        largeIcon = UIImage(named: largeIconName)

        artists += playlistDictionary["artists"] as [String]

        let colorsDictionary = playlistDictionary["backgroundColor"] as [String: CGFloat]

        backgroundColor = rgbColorFromDictionary(colorsDictionary)


    }