public function setMentionButton($mention = null): void
	{
		$this->element->addClass('twitter-mention-button');

		// Build URL
		$url = new Url(self::TWITTER_TWEET_URL);
		$url->setQueryParameter('screen_name', $mention);
		$this->href = (string) $url;

		if ($mention) {
			$this->elementText = 'Tweet to @' . $mention;
		}
	}