/**
  * @param Mana_Seo_Model_Context $context
  * @param Mana_Seo_Model_Url $parameterUrl
  * @return Mana_Seo_Helper_Url
  */
 public function unregisterParameter($context, $parameterUrl)
 {
     $context->popData('expect_value');
     $context->popData('current_parameter');
 }