public function alert(String $type, $content)
    {
        $content = $this->stringOrCallback($content);

        $this->isBootstrapAttribute('dismiss-fade', function() use(&$type)
        {
            $type .= ' alert-dismissible fade show';
        });

        $this->isBootstrapAttribute('dismiss-button', function($attribute) use(&$content)
        {
            $content .= $this->buttonDismissButton($this->spanDismissButton($attribute));  
        });

        return $this->role('alert')->class('alert alert-' . $type)->div($content);
    }