group static method
group route
Route.group('blog', () {
  Route.get('all', controller);
  Route.put('{id}/activate', controller);
});
Implementation
static void group(String prefix, Function() callback) {
  String originalPrefix = Route()._prefix;
  /// set new prefix
  Route()._prefix = originalPrefix + prefix;
  callback();
  /// restore original prefix
  Route()._prefix = originalPrefix;
}