public function run(): void
    {
        $statement = $this->connection->query("
            SELECT
                id, framework
            FROM
                tl_layout
            WHERE
                framework != ''
        ");

        while (false !== ($layout = $statement->fetch(\PDO::FETCH_OBJ))) {
            $framework = '';
            $tmp = StringUtil::deserialize($layout->framework);

            if (!empty($tmp) && \is_array($tmp)) {
                if (false !== ($key = array_search('layout.css', $tmp, true))) {
                    array_insert($tmp, $key + 1, 'responsive.css');
                }

                $framework = serialize(array_values(array_unique($tmp)));
            }

            $stmt = $this->connection->prepare('
                UPDATE
                    tl_layout
                SET
                    framework = :framework
                WHERE
                    id = :id
            ');

            $stmt->execute([':framework' => $framework, ':id' => $layout->id]);
        }

        // Add the "viewport" field (triggers the version 3.3 update)
        $this->connection->query("
            ALTER TABLE
                tl_layout
            ADD
                viewport varchar(255) NOT NULL default ''
        ");
    }
public function run(): void
    {
        $statement = $this->connection->query("
            SELECT
                id, framework
            FROM
                tl_layout
            WHERE
                framework != ''
        ");

        while (false !== ($layout = $statement->fetch(\PDO::FETCH_OBJ))) {
            $framework = '';
            $tmp = StringUtil::deserialize($layout->framework);

            if (!empty($tmp) && \is_array($tmp)) {
                if (false !== ($key = array_search('layout.css', $tmp, true))) {
                    array_insert($tmp, $key + 1, 'responsive.css');
                }

                $framework = serialize(array_values(array_unique($tmp)));
            }

            $stmt = $this->connection->prepare('
                UPDATE
                    tl_layout
                SET
                    framework = :framework
                WHERE
                    id = :id
            ');

            $stmt->execute([':framework' => $framework, ':id' => $layout->id]);
        }

        // Add the "viewport" field (triggers the version 3.3 update)
        $this->connection->query("
            ALTER TABLE
                tl_layout
            ADD
                viewport varchar(255) NOT NULL default ''
        ");
    }
{@inheritdoc}