/**
  * @param Plugin $plugin
  */
 public function __construct(Plugin $plugin)
 {
     parent::__construct($plugin, 'menu');
 }
 /**
  * @param Plugin $plugin
  * @param string $pageParent
  */
 public function __construct(Plugin $plugin, $pageParent = 'options-general.php')
 {
     parent::__construct($plugin, 'submenu');
     $this->page_parent = $pageParent;
 }