FieldRepository::getObservers

public function getObservers(string $referenceName, string $fieldName = Item::FIELD_NAME_OBSERVERS): Relation
{
	return
		(new OneToMany(
			$fieldName,
			ObserverTable::class,
			$referenceName
		))
			->configureCascadeDeletePolicy(CascadePolicy::FOLLOW)
			->configureTitle(Loc::getMessage('CRM_TYPE_ITEM_FIELD_OBSERVERS'))
	;
}