Doctrine\ODM\CouchDB\UnitOfWork::cascadeRemove PHP Method

    private function cascadeRemove($document, &$visited)
    {
        $class = $this->dm->getClassMetadata(get_class($document));
        foreach ($class->associationsMappings as $name => $assoc) {
            if ($assoc['cascade'] & ClassMetadata::CASCADE_REMOVE) {
                $related = $class->reflFields[$assoc['fieldName']]->getValue($document);
                if ($related instanceof Collection || is_array($related)) {
                    // If its a PersistentCollection initialization is intended! No unwrap!
                    foreach ($related as $relatedDocument) {
                        $this->doRemove($relatedDocument, $visited);
                    }
                } else {
                    if ($related !== null) {
                        $this->doRemove($related, $visited);
                    }
                }
            }
        }
    }