public void accept(@NotNull PsiElementVisitor visitor) {
   if (visitor instanceof CypherVisitor) ((CypherVisitor) visitor).visitSortItem(this);
   else super.accept(visitor);
 }
 public void accept(@NotNull PsiElementVisitor visitor) {
   if (visitor instanceof CypherVisitor) ((CypherVisitor) visitor).visitPropertyKeyName(this);
   else super.accept(visitor);
 }