@Override
  public @NotNull RefElementNode createRefNode(@Nullable RefEntity entity,
                                               @NotNull InspectionTreeModel model,
                                               @NotNull InspectionTreeNode parent) {
    return new UnusedDeclarationRefElementNode(entity, this, parent) {
      @Override
      protected void visitProblemSeverities(@NotNull Object2IntMap<HighlightDisplayLevel> counter) {
        // do nothing
      }
    };
  }
@Override
  public @NotNull RefElementNode createRefNode(@Nullable RefEntity entity,
                                               @NotNull InspectionTreeModel model,
                                               @NotNull InspectionTreeNode parent)