How to setup a single route with optional argument

Create 2 routes: 

user_details/(:num)/(:any)
user_details/(:num)

for one controller MyClass->userDetails($a, $b=null) ?

EDIT: Its work fine

PHP Code:

// Routes
$routes->get('/products/(:num)/(:any)', 'Product::oneSegment/$1/$2');
$routes->get('/products/(:num)', 'Product::oneSegment/$1');

// Controller
class Product extends BaseController
{
    /**
    * @see http://localhost:8080/products/111
    * @see http://localhost:8080/products/111/adaw/adawd/awdawdeg/
    */
    public function oneSegment($segment1, ...$segments)
    {
        return response()->setBody('Product::oneSegment with ' . $segment1 . ' and ' . implode(', ', $segments) . ' loaded');
    }
}

// Output
Product::oneSegment with 111 and loaded
Product::oneSegment with 111 and awdaw, adawd loaded 


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