<span class="p">:</span> <span class="kt">String</span><span class="p">?,</span> <span class="nv">album</span><span class="p">:</span> <span class="kt">String</span><span class="p">?,</span> <span class="nv">genre</span><span class="p">:</span> <span class="kt">String</span><span class="p">?,</span> <span class="nv">trackno</span><span class="p">:</span> <span class="kt">Int</span><span class="p">?)</span></code></pre>

                        </div>
                      </div>
                    </sectio