code: function(callback) {
    async.parallelAsync([
      tox.addGroupchat.bind(tox),
      tox.getAV().addGroupchat.bind(tox.getAV())
    ]).then(function(results) {
      groupchats['text'] = results[0];
      groupchats['av'] = results[1];
    }).finally(callback);
  }
docs: Initialize the groupchats, and call the callback when finished.