prepareManualSorting example

    public function create(array $params)
    {
        $this->checkPrivilege('create');

        $category = new CategoryModel();

        $params = $this->prepareCategoryData($params);
        $params = $this->prepareMediaData($params, $category);
        $params = $this->prepareManualSorting($params, $category);

        $category->fromArray($params);

        if (isset($params['id'])) {
            $metaData = $this->getManager()->getMetadataFactory()->getMetadataFor(CategoryModel::class);
            $metaData->setIdGeneratorType(ClassMetadataInfo::GENERATOR_TYPE_NONE);
            $category->setPrimaryIdentifier($params['id']);
        }

        $violations = $this->getManager()->validate($category);
        if ($violations->count() > 0) {