Example usage of BundleDelegate

MusicPlayerFragment.kt

class MusicPlayerFragment : Fragment() {
    private val playlistId by lazy { arguments.playlistId }
    private val songIndex by lazy { arguments.songIndex }

    companion object {
        private var Bundle.playlistId by BundleDelegate.String("key_playlist_id")
        private var Bundle.songIndex by BundleDelegate.Int("key_song_index")

        fun newInstance(playlistId: String, songIndex: Int) = MusicPlayerFragment().apply {
            arguments = Bundle().apply {
                this.playlistId = playlistId
                this.songIndex = songIndex
            }
        }
    }
}