Manager/GenericDocumentManager.php
public function remove($documents)
    {
        if (!count($documents)) {
            return false;
        }

        foreach ($documents as $document) {
            $this->dm->remove($document);
        }

        return $this->dm->flush();
    }
public function remove($documents)
    {
        if (!count($documents)) {
            return false;
        }

        foreach ($documents as $document) {
            $this->dm->remove($document);
        }

        return $this->dm->flush();
    }
save

@param Iterable Array/Iterable of objects or object