ap2i/src/Doctrine/Access/Extensions/AdminExtension.php

<?php
declare(strict_types=1);

namespace App\Doctrine\Access\Extensions;

use App\Doctrine\Access\AccessExtensionInterface;
use Doctrine\ORM\QueryBuilder;

class AdminExtension implements AccessExtensionInterface {
    public function support(string $name): bool
    {
        return $name === 'cget_admin';
    }

    public function addWhere(QueryBuilder $queryBuilder)
    {
        $rootAlias = $queryBuilder->getRootAliases()[0];
        $queryBuilder->andWhere(sprintf('%s.adminAccess = :adminAccess', $rootAlias));
        $queryBuilder->setParameter('adminAccess', true);
    }
}