public function testDispatchConstraintsNot()
{
$this->primeBuilder();
$not = $this->qb->where()->not()->fieldIsset('alias_1.prop_1');
$res = $this->converter->dispatch($not);
$this->assertInstanceOf('PHPCR\\Query\\QOM\\NotInterface', $res);
$this->assertInstanceOf('PHPCR\\Query\\QOM\\PropertyExistenceInterface', $res->getConstraint());
}