/**
* @param string $pattern
* @param IUrl $url
* @param string $key
*
* @return string
*/
protected function setPort($pattern, IUrl $url, $key = ':port')
{
$port = $url->getPort();
if ($port) {
$port = s(':%s', $port);
}
$pattern = s($pattern, [$key => $port]);
return $pattern;
}