/**
  * @param \GoogleAnalyticsTracker\HitTypes\Page $page
  * @return mixed
  */
 public function map($page)
 {
     if (!$page instanceof \GoogleAnalyticsTracker\HitTypes\Page) {
         throw new \UnexpectedValueException("The Page Mapper only accepts Page HitTypes");
     }
     $data = array('t' => \GoogleAnalyticsTracker\HitTypes\Page::TYPE, 'dh' => $page->getDomain(), 'dp' => $page->getPage());
     if ($page->hasTitle()) {
         $data['dt'] = $page->getTitle();
     }
     $data = array_merge($data, parent::map($page));
     return $data;
 }