Disjunctive Normal Form (DNF) Types is not parsed

[abdul-alhasany]

Hi It seems that Disjunctive Normal Form (DNF) Types is not supported yet. It is showing syntax error when displayed.

It would be great if it is supported in the pareser.

Example:

class Foo {
    public function bar((A&B)|null $entity) {
        return $entity;
    }
}