Yii2 URL manager cache class

You might come across the below warning if you have not set a cache to your Yii2 application while using URL manager.

Unable to use cache for URL manager: Failed to instantiate component or class "cache".

In order to remove that warning, setup a cache in your application’s configuration.

We are using the DummyCache class here as we have yet to decide on one that we want to use.

'components' => [
    'cache' => [
        'class' => 'yii\caching\DummyCache', // FIXME
    ],
],