/**
  * Registration overview
  *
  * @Privilege("default")
  */
 public function renderDefault()
 {
     $sections = $this->registrations->getAllGroups();
     $groups = [];
     foreach ($sections as $group) {
         $groups[$group]['name'] = $group;
         $groups[$group]['members'] = $this->registrations->getMembersOfGroup($group);
     }
     $this->template->groups = $groups;
 }