NarrowArrayCollectionToCollectionRector

Narrow ArrayCollection to Collection in class method and property

 use Doctrine\Common\Collections\ArrayCollection;

 final class ArrayCollectionGeneric
 {
     /**
-     * @return ArrayCollection<int, string>
+     * @return \Doctrine\Common\Collections\Collection<int, string>
      */
     public function someMethod()
     {
     }
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\Doctrine\TypedCollections\Rector\ClassMethod\NarrowArrayCollectionToCollectionRector;

return RectorConfig::configure()
    ->withRules([
        NarrowArrayCollectionToCollectionRector::class,
    ]);