public function traverse(IRequestVisitor $visitor) { return $visitor->visitFirst($this); }
public function traverse(IRequestVisitor $visitor) { return $visitor->visitMinimum($this); }
public function traverse(IRequestVisitor $visitor) { return $visitor->visitIssetIndex($this); }
public function traverse(IRequestVisitor $visitor) { return $visitor->visitIsEmpty($this); }
public function traverse(IRequestVisitor $visitor) { return $visitor->visitContains($this); }