src/Concerns/HasHttpAssertions.php
protected function identifiers($ids, string $type = null): array
    {
        return Compare::identifiers($ids, $type ?: $this->getExpectedType());
    }
protected function identifiers($ids, string $type = null): array
    {
        return Compare::identifiers($ids, $type ?: $this->getExpectedType());
    }
Ensure the value is an array of identifiers.

@param UrlRoutable|string|int|iterable $ids
@param string|null $type
@return array