/** * Gets the relations that will be seeded on to the provided rows * * @param array $keys The keys for which to fetch related items * @param closure $constraint The constraint function to limit related items * @return array * @since 2.0.0 **/ protected function getRelations($keys, $constraint = null) { if (isset($constraint)) { call_user_func_array($constraint, array($this->related)); } return $this->related->whereIn($this->relatedKey, array_unique($keys)); }