edia[&#39;replaceAudio&#39;] ? &quot;Replacing&quot; : &quot;Adding&quot;) +
            &quot; audio track:&quot; +
            stream.getAudioTracks()[0].toString());
        Map&lt;String, dynamic&gt; audioTransceiver;
        &#47;&#47; FIX ME
        &#47;&#47; List transceivers = pc.getTransceivers();
        List transceivers = [];
        if (transceivers != null &amp;&amp; transceivers.length &gt; 0) {
          for (var t in transceivers) {
            &#47;&#47; TODO sender is MediaStreamTrack
  