Dingo+Laravel-modules 时调用的接口版本无法指定版本 接口?

文件位置: Modules\TestApi\routes.php

<?php

$api = app('Dingo\Api\Routing\Router');

$api->version('v1', function ($api) {
    $api->group(['middleware' => 'api', 'prefix' => 'testapi', 'namespace' => 'Modules\TestApi\Http\V1\Controllers'], function($api)
    {
        $api->get('/version', function(){
            return 'this is Modules routes version 1';
        });
    });

});

$api->version('v2', function ($api) {
    $api->group(['middleware' => 'api', 'prefix' => 'testapi', 'namespace' => 'Modules\TestApi\Http\V2\Controllers'], function($api)
    {
        $api->get('/version', function(){
            return 'this is Modules routes version 2';
        });
    });

});

调用接口时报错误:

{
"message": "",
"exception": "Symfony\\Component\\HttpKernel\\Exception\\NotFoundHttpException",
"file": "/home/www-data/my_v2_laravel/vendor/laravel/framework/src/Illuminate/Routing/RouteCollection.php",
"line": 179,
....
...
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