/**
  * Render field HRML for column
  *
  * @param Varien_Object $row
  * @return string
  */
 public function render(Varien_Object $row)
 {
     $actions = array();
     if ($row->getIsReturnable()) {
         $actions[] = array('@' => array('href' => $this->getUrl('*/rma/new', array('order_id' => $row->getId()))), '#' => Mage::helper('enterprise_rma')->__('Return'));
     }
     $link1 = parent::render($row);
     $link2 = $this->_actionsToHtml($actions);
     $separator = $link1 && $link2 ? '<span class="separator">|</span>' : '';
     return $link1 . $separator . $link2;
 }