如何在同一个类的静态方法中访问类的受保护变量？

Question

Below is the scenario:

class PopupsAdminSettingsPage extends AbstractAdminSubPage
{
    protected $menuTitle = 'Settings';

    public static function getMenuTitle()
    {
        /* I want to access $menuTitle property here ...
    }
}

I want to access the $menuTitle property inside the static function getMenuTitle so that I could access the protected variable outside of the Class PopupsAdminSettingsPage too.