使Yii隐式使用类

Question

I have a 3rd party library that I import this way:

Yii::setPathOfAlias('Payum', dirname(__FILE__).'/../extensions/PayumYiiExtension/vendor');
Yii::import('Payum.autoload', true); // <--- note that this is Composer's autoload class

Now, everything is working as expected if I write some explicit use lines:

use Buzz\Client\Curl;
use Payum\Core\Extension\StorageExtension;
use Payum\Core\Storage\FilesystemStorage;
use ...

But I'm wondering if there is any way to make Yii auto-load/use those classes when they are used, instead of having to write all those use lines myself.