@Override
    public @NotNull Comparator<PsiElement> getComparator() {
      return Comparator.comparing(el -> {
        PsiExpression expr = (PsiExpression)el;
        return ((PsiReferenceExpression)Objects.requireNonNull(PsiUtil.skipParenthesizedExprDown(expr))).getReferenceName();
      });
    }
@Override
    public @NotNull Comparator<PsiElement> getComparator()