InvitationSent::getAdditionalIconButton

public function getAdditionalIconButton(): ?Layout\Footer\IconButton
{
	$result = null;
	$linkUrl = $this->getLinkUrl();
	if ($linkUrl)
	{
		$result = (new Layout\Footer\IconButton(
			'qr-code',
			$this->getMessage('CRM_TIMELINE_CALENDAR_SHARING_QR_CODE_BUTTON'))
		)
			->setAction(
				(new Layout\Action\JsEvent('CalendarSharingInvitationSent:ShowQr'))
					->addActionParamString('url', $linkUrl)
			)
			->setScopeWeb()
		;
	}

	return $result;
}