@Override
        protected boolean customizeNonPsiElementLeftRenderer(ColoredListCellRenderer renderer,
                                                             JList list,
                                                             Object value,
                                                             int index,
                                                             boolean selected,
                                                             boolean hasFocus) {
          if (value == null) {
            renderer.append(JavaCompilerBundle.message("all.inheritors", numberOfInheritors));
            return true;
          }
          return super.customizeNonPsiElementLeftRenderer(renderer, list, value, index, selected, hasFocus);
        }
@Override
        protected boolean customizeNonPsiElementLeftRenderer(ColoredListCellRenderer renderer,
                                                             JList list,
                                                             Object value,
                                                             int index,
                                                             boolean selected,
                                                             boolean hasFocus)