$value * * @return iterable */ function allContains(iterable $value, string $subString): iterable { Assert::allContains($value, $subString); return $value; } /** * @psalm-pure * * @param iterable $value * * @return iterable */ function allNullOrContains(iterable $value, string $subString): iterable { Assert::allNullOrContains($value, $subString); return $value; }