/**
  * Returns the abstract content of the docHeader as an array
  *
  * @return array
  */
 public function docHeaderContent()
 {
     return ['enabled' => $this->isEnabled(), 'buttons' => $this->buttonBar->getButtons(), 'menus' => $this->menuRegistry->getMenus(), 'metaInformation' => $this->metaInformation];
 }