/**
  * @param DisplayInterface $display
  * @param string           $label
  * @param bool|false       $active
  *
  * @return $this
  */
 public function appendDisplay(DisplayInterface $display, $label, $active = false)
 {
     $tab = \SleepingOwlDisplay::tab($display)->setLabel($label)->setActive($active);
     $this->tabs[] = $tab;
     return $tab;
 }