Doctrine\Common\DataFixtures\Loader::orderFixturesByNumber PHP Метод

    private function orderFixturesByNumber()
    {
        $this->orderedFixtures = $this->fixtures;
        usort($this->orderedFixtures, function ($a, $b) {
            if ($a instanceof OrderedFixtureInterface && $b instanceof OrderedFixtureInterface) {
                if ($a->getOrder() === $b->getOrder()) {
                    return 0;
                }
                return $a->getOrder() < $b->getOrder() ? -1 : 1;
            } elseif ($a instanceof OrderedFixtureInterface) {
                return $a->getOrder() === 0 ? 0 : 1;
            } elseif ($b instanceof OrderedFixtureInterface) {
                return $b->getOrder() === 0 ? 0 : -1;
            }
            return 0;
        });
    }