@brief updates a JSON object from another object, overwriting existing keys @sa https://json.nlohmann.me/api/basic_json/update/

* @brief Update cipher expiry * @param expiry expiry time */

! @brief return the value of an iterator @pre The iterator is initialized; i.e. `m_object != nullptr`. */

* @brief Move constructor. */

These defaults are necessary for use with containers

LeafNode