public static function getScheduledAClassContentInsertions(EntityManager $em, $with_revision = false, $exclude_base_element = false)
    {
        $entities = array();
        foreach ($em->getUnitOfWork()->getScheduledEntityInsertions() as $entity) {
            if (false !== $tmp = self::getScheduledEntity($entity, $with_revision, $exclude_base_element)) {
                $entities[] = $tmp;
            }
        }

        return $entities;
    }