Elgg\Upgrade\Locator::getBatch PHP Method

    public function getBatch($class)
    {
        if (!class_exists($class)) {
            $this->logger->error("Upgrade class {$class} was not found");
            return false;
        }
        $batch = new $class();
        if (!$batch instanceof Batch) {
            $this->logger->error("Upgrade class {$class} should implement Elgg\\Upgrade\\Batch");
            return false;
        }
        $version = $batch::VERSION;
        // Version must be in format yyyymmddnn
        if (preg_match("/^[0-9]{10}\$/", $version) == 0) {
            $this->logger->error("Upgrade {$class} defines an invalid upgrade version: {$version}");
            return false;
        }
        if (!$batch->isRequired()) {
            return false;
        }
        return $batch;
    }