public static boolean isRemovable(final @NotNull GroupItem group) {
    final ComponentItem[] items = group.getItems();
    for (int i = items.length - 1; i >= 0; i--) {
      if (!items[i].isRemovable()) {
        return false;
      }
    }
    return true;
  }
public static boolean isRemovable(final @NotNull GroupItem group)