src/Registry/DoctrineOrmManagerRegistry.php
public function getRepository($persistentObject, $persistentManagerName = null): ObjectRepository
    {
        return $this->getManager($persistentManagerName)->getRepository($persistentObject);
    }
public function getRepository($persistentObject, $persistentManagerName = null): ObjectRepository
    {
        return $this->getManager($persistentManagerName)->getRepository($persistentObject);
    }
@param string $persistentObject
@param null   $persistentManagerName

@return EntityRepository|ObjectRepository