private function init()
{
$this->setPrefix($this->getConfig('prefix', 'twitter:'));
$this->setType($this->getConfig('card', static::TYPE_SUMMARY));
$this->setSite($this->getConfig('site', ''));
$this->setTitle($this->getConfig('title', ''));
$this->addMetas($this->getConfig('metas', []));
return $this;
}