Layton/App.php
public function group($match, $callback)
    {
        $group = new RouteGroup($this->container, $match);
        $callback($group);
        return $group;
    }
public function group($match, $callback)
    {
        $group = new RouteGroup($this->container, $match);
        $callback($group);
        return $group;
    }
public function group ( $ match , $ callback ) { $ group = new RouteGroup ( $ this -> container , $ match ) ; $ callback ( $ group ) ; return $ group ; }
Route group.

@param string $match
@param callback $callback

@return RouteGroup
Route group .