AddGetReferenceTypeRector

Change $this->getReference() in data fixtures to fill reference class directly

 use Doctrine\Common\DataFixtures\AbstractDataFixture;

 final class SomeFixture extends AbstractDataFixture
 {
     public function run(SomeEntity $someEntity)
     {
-        $someEntity->setSomePassedEntity($this->getReference('some-key'));
+        $someEntity->setSomePassedEntity($this->getReference('some-key'), SomeReference::class);
     }
 }

Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\Doctrine\DoctrineFixture\Rector\MethodCall\AddGetReferenceTypeRector;

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