Getting there

lib/src/router.dart

@@ -189,7 +189,7 @@ class Router extends Extensible {
   /// For example, if the [Router] has a middleware 'y', and the `namespace`
   /// is 'x', then that middleware will be available as 'x.y' in the main router.
   /// These namespaces can be nested.
-  void use(Pattern path, Router router,
+  void mount(Pattern path, Router router,
       {bool hooked: true, String namespace: null}) {
     // Let's copy middleware, heeding the optional middleware namespace.
     String middlewarePrefix = namespace != null ? "$namespace." : "";

test/route/with_params.dart

@@ -6,7 +6,7 @@ main() {
   final fooById = foo.child(':id((?!bar)[0-9]+)', handlers: ['bar']);
   final bar = fooById.child('bar');
   final baz = bar.child('//////baz//////', handlers: ['hello', 'world']);
-  final bazById = baz.child(':bazId([A-Za-z]+)');
+  final bazById = baz.child(':bazId([A-Za-z]+)?');
   new Router(root: foo).dumpTree();
 
   test('matching', () {

test/router/use.dart

@@ -17,7 +17,7 @@ main() {
     c = router.post('c', 'Hello nested');
   });
 
-  parent.use('child', child);
+  parent.mount('child', child);
   parent.dumpTree(header: tattleAll([parent, child, a]));
 
   group('no params', () {