FriendsOfSymfony / FOSElasticaBundle

        // sort objects in the order of ids

        $idPos = array_flip($ids);

        usort($objects, function($a, $b) use ($idPos, $identifier, $propertyAccessor)

        {

            return $idPos[$propertyAccessor->getValue($a, $identifier)] > $idPos[$propertyAccessor->getValue($b, $identifier)];

        });

        return $objects;

    }

    {

        $propertyAccessor = $this->propertyAccessor;

        return function ($a, $b) use ($idPos, $identifierPath, $propertyAccessor) {

            return $idPos[$propertyAccessor->getValue($a, $identifierPath)] > $idPos[$propertyAccessor->getValue($b, $identifierPath)];

        };

    }

}