FluidTYPO3\Vhs\ViewHelpers\Condition\Iterator\ContainsViewHelper::assertHaystackIsObjectStorageAndHasNeedle PHP Метод

    protected static function assertHaystackIsObjectStorageAndHasNeedle($haystack, $needle)
    {
        $index = 0;
        /** @var $candidate DomainObjectInterface */
        if (true === $needle instanceof AbstractDomainObject) {
            $needle = $needle->getUid();
        }
        foreach ($haystack as $candidate) {
            if ((int) $candidate->getUid() === (int) $needle) {
                return $index;
            }
            $index++;
        }
        return false;
    }