Fix PHPStan with Doctrine

object-manager.php

<?php

// this file is in tests/object-manager.php

use App\Kernel;
use Symfony\Component\Dotenv\Dotenv;

require __DIR__ . '/../vendor/autoload.php';

(new Dotenv())->bootEnv(__DIR__ . '/../.env');

$kernel = new Kernel($_SERVER['APP_ENV'], (bool) $_SERVER['APP_DEBUG']);
$kernel->boot();
/** @var \Doctrine\Bundle\DoctrineBundle\Registry */
$doctrine = $kernel->getContainer()->get('doctrine');
return $doctrine->getManager();

phpstan.neon

includes:
    - vendor/phpstan/phpstan-doctrine/extension.neon
    - vendor/phpstan/phpstan-doctrine/rules.neon
    - vendor/phpstan/phpstan-symfony/extension.neon
parameters:
    excludePaths:
        - src/DataFixtures
        - src/Security
    ignoreErrors:
        - '#Call to an undefined method [a-zA-Z0-9\\_]+::findOneBy[A-Z][a-zA-Z]*\(\)#'
        - '#Call to an undefined method [a-zA-Z0-9\\_]+::findBy[A-Z][a-zA-Z]*\(\)#'
    reportUnmatchedIgnoredErrors: false
    checkGenericClassInNonGenericObjectType: false
    checkMissingIterableValueType: false
    doctrine:
        objectManagerLoader: tests/object-manager.php