public function addPage(Page $page)
 {
     $id = $page->getId();
     $path = new \stdClass();
     $path->path = $page->getPath();
     $path->siteId = $page->getSiteId();
     $path->siteName = $page->getSiteName();
     $psi_std = new \stdClass();
     $psi_std->id = $id;
     $psi_std->path = $path;
     $psi_std->type = Page::TYPE;
     $psi_std->recycled = false;
     $this->pages[] = new p\PublishableAssetIdentifier($psi_std);
     return $this;
 }