/**
* Update specified argument
*
* @param Mage_Core_Block_Text $argument
* @return Mage_Core_Block_Text
*/
public function update($argument)
{
$calls = $argument->getUpdaterCall();
if (true == empty($calls)) {
$calls = array();
}
$calls[] = 'updater call';
$argument->setUpdaterCall($calls);
return $argument;
}
