public function save($timestamp = null)
    {
        if (null === $timestamp) {
            // @codingStandardsIgnoreStart
            @\trigger_error(
                'Not passing a timestamp has been deprecated and will cause an error in MetaModels 3',
                E_USER_DEPRECATED
            );
            // @codingStandardsIgnoreEnd
        }

        $objMetaModel = $this->getMetaModel();
        $objMetaModel->saveItem($this, $timestamp);
    }