public static function navBarHeader($handle, $brand)
    {
        $navstyle       = '.navbar-'.$handle.'-collapse';
        $nbhc['button'] = new \Ease\Html\ButtonTag([new \Ease\Html\Span(
                _('Switch navigation'), ['class' => 'sr-only']), new \Ease\Html\Span(
                null, ['class' => 'icon-bar']), new \Ease\Html\Span(
                null, ['class' => 'icon-bar']), new \Ease\Html\Span(
                null, ['class' => 'icon-bar'])],
            ['type' => 'button', 'class' => 'navbar-toggle', 'data-toggle' => 'collapse',
            'data-target' => $navstyle,]);
        if (strlen($brand)) {
            $nbhc['brand'] = new \Ease\Html\ATag('./', $brand,
                ['class' => 'navbar-brand']);
        }

        return new \Ease\Html\DivTag($nbhc, ['class' => 'navbar-header']);
    }