Mage2\Page\Module::registerPermissions PHP Method

    protected function registerPermissions()
    {
        $permissions = [['title' => 'Order List', 'routes' => 'admin.order.index'], ['title' => 'Order View, Send Email Invoice to Customer', 'routes' => "admin.order.view,admin.order.send-email-invoice"], ['title' => 'Order Update Status', 'routes' => "admin.order.change-status,admin.order.update-status"]];
        foreach ($permissions as $permission) {
            Permission::add($permission);
        }
    }