$array * @param array-key $key * * @return iterable */ function allKeyExists(iterable $array, $key): iterable { Assert::allKeyExists($array, $key); return $array; } /** * @psalm-pure * * @param iterable $array * @param array-key $key * * @return iterable */ function allNullOrKeyExists(iterable $array, $key): iterable { Assert::allNullOrKeyExists($array, $key); return $array; }