Ergo\Routing\Router::controller PHP Method

    public function controller($name)
    {
        if (isset($this->_controllers[$name]) && ($controller = $this->_controllers[$name])) {
            $name = is_callable($controller) ? new CallbackController($controller) : $controller;
            if (is_object($name)) {
                return $name;
            }
        }
        if ($this->_resolver) {
            return $this->_resolver->resolve($name);
        }
        throw new LookupException("No controller defined for route '{$name}'");
    }