function displayMetaData() {
    /*
    Define the image meta data keys. These are managed separately
    since we aren't actually changing the inner HTML of these elements.
    */
    var imageMetaDataKeys = ["cover_art_url", "station_art_url", "podcast_episode_cover_art_url"];

    /*
    Get all of the song info elements
    */
    var songInfoElements = document.querySelectorAll("[data-amplitude-song-info]");

    /*
    Iterate over all of the song info elements. We will either
    set these to the new values, or clear them if the active song
    doesn't have the info set.
    */
    for (var i = 0; i < songInfoElements.length; i++) {
      /*
      Get the info so we can check if the active meta data has the
      key.
      */
      var info = songInfoElements[i].getAttribute("data-amplitude-song-info");

      /*
      Grab the playlist and song index.
      */
      var playlist = songInfoElements[i].getAttribute("data-amplitude-playlist");
      var songIndex = songInfoElements[i].getAttribute("data-amplitude-song-index");

      /*
      Ensure that we don't set any individual elements now. We set this with the
      sync meta data method. The reason we don't set them here is because
      all individual songs would get the now playing artwork. If the playlists
      match or the element is a main element meaning it doesn't
      belong to a playlist or a song, then we set the song info.
      */
      if (songIndex == null && (_config2.default.active_playlist == playlist || playlist == null && songIndex == null)) {
        /*
        If the active metadata has the key, then we set it,
        otherwise we clear it. If it's an image element then
        we default it to the default info if needed.
        */
        var val = _config2.default.active_metadata[info] != undefined ? _config2.default.active_metadata[info] : null;
        if (imageMetaDataKeys.indexOf(info) >= 0) {
          val = val || _config2.default.default_album_art;
          songInfoElements[i].setAttribute("src", val);
        } else {
          val = val || "";
          songInfoElements[i].innerHTML = val;
        }
      }
    }
  }
Displays the active song's metadata. This is called after a song has
been changed. This method takes the active song and displays the
metadata. So once the new active song is set, we update all of the
screen elements.

@access public