/**
* Returns the concrete failed constraint.
* @param \Brickoo\Component\Validation\Constraint\Constraint $constraint
* @return null|\Brickoo\Component\Validation\Constraint\Constraint
*/
private function getConcreteFailedConstraint(Constraint $constraint)
{
if ($constraint instanceof AndOrConstraint) {
return $constraint->getFailedConstraint();
}
return $constraint;
}