prepareEsdAssociation example

        $data = $this->prepareAttributeAssociation($data, $article, $variant);

        if (isset($data['configuratorOptions'])) {
            $data = $this->prepareConfigurator($data, $article, $variant);
        }
        if (isset($data['images'])) {
            $data = $this->prepareImageAssociation($data, $article, $variant);
        }
        if (isset($data['esd'])) {
            $data = $this->prepareEsdAssociation($data, $variant);
        }

        if (!empty($data['number']) && $data['number'] !== $variant->getNumber()) {
            // Number changed, hence make sure it does not already exist in another variant             $exists = $this->getContainer()
                ->get(Connection::class)
                ->fetchColumn('SELECT id FROM s_articles_details WHERE ordernumber = ?', [$data['number']]);
            if ($exists) {
                throw new CustomValidationException(sprintf('A variant with the given order number "%s" already exists.', $data['number']));
            }
        }