App\Providers\SettingsServiceProvider::boot PHP Method

    public function boot()
    {
        $app = $this->app;
        // register default manage theme.
        $this->registerDefaultTheme();
        // register settings menus;
        $this->registerSettingsMenus();
        // register settings permission type
        //        $this->registerSettingsPermissionType();
        $this->registerPermissionUIObject();
    }