Parser do not account use alias for parent classes

[Hubbitus]

Said I have class:

<?php
...
namespace Pimcore\Model\Document\Editable\Loader;

use Pimcore\Loader\ImplementationLoader\PrefixLoader as BasePrefixLoader;

/**
 * @internal
 */
final class PrefixLoader extends BasePrefixLoader
{

Parser failed on it with:

In ClassParser.php line 205:
                                                                                                        
  Parent class [BasePrefixLoader] for [Pimcore\Model\Document\Editable\Loader\PrefixLoader] not found! 

(Error message include fix in #38)