function __construct($metas = null)
{
parent::__construct('document', null);
$this->setMetas($metas);
$this->sitemap = null;
$this->styles = array();
$this->custom_style_components = array();
$this->embedStyle(false);
$this->header = new Wtk_Section('header', null);
$this->aside = new Wtk_Section('aside', null);
$this->footer = new Wtk_Section('footer', null);
}
