home_route:
   path:     /
   defaults: { controller: 'FooController::indexAction' }
 
 foo_route:
   path:     /foo

   defaults: { controller: 'FooConduit::index' }

 
 foo_placeholder_route:
   path:     /foo/{id}

   defaults: { controller: 'FooConduit::load' }

   requirements:
     id: '[0-9]+'