NarrowPropertyUnionToCollectionRector

Narrow union type to Collection type in property docblock and native type declaration

 use Doctrine\Common\Collections\Collection;

 class SomeClass
 {
     /**
-     * @var Collection|array
+     * @var Collection
      */
     private $property;
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\Doctrine\TypedCollections\Rector\Property\NarrowPropertyUnionToCollectionRector;

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