test

protected function renderForm()
{

   

    
//        $img_url = ImageManager::thumbnail(
//            $logoPath,
//            'carrier_mini_' . $this->l('ID') . '.jpg',
//            34
//        );
   // $img_url = ImageManager::thumbnail($logoPath, $logoPath, 350,
    //    'jpg', true, true);
   // $image_size = file_exists($logoPath) ? filesize($logoPath) / 1000 : false;
    //var_dump($this->id);


    $fields = array(
        'id_carrier' => array(
            'title' => $this->l('ID'),
            'width' => 140,
            'type' => 'text',
        ),
       'custom_image' => array(
            'title' => 'Logo',
            'type' => 'text',
            'align' => 'center',
            'callback' => 'printCarrierIcon',            
        ),
        'name' => array(
            'title' => $this->l('Name'),
            'width' => 140,
            'type' => 'text',
        ),
        'service_fees' => array(
            'title' => 'Frais de préparation',
            'width' => 60,
            'type' => 'text',
        )
    );

    $helper = new HelperList();
    $helper->shopLinkType = '';
    $helper->simple_header = false;
    $helper->token = Tools::getAdminTokenLite('AdminModules');

    $helper->actions = array('edit');

    $helper->identifier = 'id_carrier';
    $helper->show_toolbar = true;
    $helper->title = 'Frais de préparation';

    /*$helper->fieldImageSettings = array(
        'name' => 'logo',
        'dir' => 's',
    );*/

    $helper->currentIndex = AdminController::$currentIndex . '&configure=' . $this->sibling->name;
    //$carrier_list = CarrierCore::getCarriers(Context::getContext()->language->id, false, false, false, null, CarrierCore::ALL_CARRIERS);

     $sql = 'SELECT `' . _DB_PREFIX_ . 'carrier`.id_carrier,0 as custom_image,`' . _DB_PREFIX_ . 'carrier`.name,`' . _DB_PREFIX_ . 'fa_carrier_services`.services_fees
             FROM `' . _DB_PREFIX_ . 'carrier` 
             LEFT JOIN `' . _DB_PREFIX_ . 'fa_carrier_services` ON `' . _DB_PREFIX_ . 'carrier`.id_carrier = `' . _DB_PREFIX_ . 'fa_carrier_services`.carrier_id_carrier
             WHERE `' . _DB_PREFIX_ . 'carrier`.active = 1 and `' . _DB_PREFIX_ . 'carrier`.deleted = 0';

    $list = Db::getInstance()->ExecuteS($sql);

    for($i = 0; $i < count($list); $i++){ 
        $logoPath = _PS_TMP_IMG_DIR_ .'/carrier_mini_'. $list[$i]['id_carrier'] . '_1.jpg';
        $this->fields_value[0]['image'] = $logoPath;
    }

    return $helper->generateList($list, $fields);
}

public function printCarrierIcon($value)
{
    return '<span class="label label-primary">Test Label</span>';
}