docs: public static void registerDefaultIconSets() {
          final FontAwesome fontAwesome = new FontAwesome();
          final Typicon typicon = new Typicon();
          final MaterialIcons materialIcons = new MaterialIcons();
  
          REGISTERED_ICON_SETS.put(fontAwesome.fontPath(), fontAwesome);
          REGISTERED_ICON_SETS.put(typicon.fontPath(), typicon);
          REGISTERED_ICON_SETS.put(materialIcons.fontPath(), materialIcons);
      }