prefix method
Implementation
Router prefix([String? prefix]) {
if (prefix != null && _routes.isNotEmpty) {
final route = _routes.last;
final basePath = route.path.startsWith('/')
? route.path.substring(1)
: route.path;
route.path = prefix.endsWith("/")
? "$prefix$basePath"
: "$prefix/$basePath";
}
return this;
}