anchor.diff:      
       HttpRequest.request(requestStr)
       .then((HttpRequest request) {
  +      // Clear our data and show our album info.
         clearAllData();
         dataList.attributes['class'] = "albums";
         dataList.style.display = "block";
         songsTable.style.display = "none";
         
  +      // If we had an artist, add an all songs and set the titleDiv.
         if(artist != null) {
           LIElement allSongsElement = new LIElement()
             ..text = "All Songs"
  
positive.code:   }
  
    /**
     * Get all the [Song]s in the library and add them to the page.
     */
    void getAllSongs() {
      HttpRequest.request("/songs")
  
negative.code:       });
    }
    
    /**
     * Fill the song table with the passed in songs.
     */
    void createSongTable(List songsList) {
      // The songs come in a list of json data.
      // For every song:
  