/** * @param Route $parent * @param Route $child * @return Route */ protected function merge(Route $parent, Route $child) { !$child->scheme() && $parent->scheme() && ($child[Arg::SCHEME] = $parent->scheme()); !$child->host() && $parent->host() && ($child[Arg::HOST] = $parent->host()); !$child->port() && $parent->port() && ($child[Arg::PORT] = $parent->port()); return $child; }