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