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// site/config/config.php
return [
    'thumbs' => [
        'driver' => 'vips',
    ],
];

class MigrationTest extends Migration
{
    public function up()
    {
        $result = Db::query(
            'ALTER TABLE `my_table`
            ADD COLUMN `test` INT DEFAULT NULL;
        ');

        if (!$result) throw Db::lastError();
    }
}