/**
* {@inheritdoc}
*/
public function getConstraints()
{
$constraints = parent::getConstraints();
// Remove the 'AllowedValuesConstraint' validation constraint because entity
// reference fields already use the 'ValidReference' constraint.
foreach ($constraints as $key => $constraint) {
if ($constraint instanceof AllowedValuesConstraint) {
unset($constraints[$key]);
}
}
return $constraints;
}
