private function buildSubprojectList(PhabricatorProject $project)
 {
     if (!$project->getHasSubprojects()) {
         return null;
     }
     $viewer = $this->getViewer();
     $id = $project->getID();
     $limit = 25;
     $subprojects = id(new PhabricatorProjectQuery())->setViewer($viewer)->withParentProjectPHIDs(array($project->getPHID()))->needImages(true)->withStatuses(array(PhabricatorProjectStatus::STATUS_ACTIVE))->withIsMilestone(false)->setLimit($limit)->execute();
     if (!$subprojects) {
         return null;
     }
     $subproject_list = id(new PhabricatorProjectListView())->setUser($viewer)->setProjects($subprojects)->renderList();
     $view_all = id(new PHUIButtonView())->setTag('a')->setIcon(id(new PHUIIconView())->setIcon('fa-list-ul'))->setText(pht('View All'))->setHref("/project/subprojects/{$id}/");
     $header = id(new PHUIHeaderView())->setHeader(pht('Subprojects'))->addActionLink($view_all);
     return id(new PHUIObjectBoxView())->setHeader($header)->setBackground(PHUIBoxView::GREY)->setObjectList($subproject_list);
 }