Yo saveData, getData.
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/489971/1343998/Save%20and%20Get.js
// @require https://update.greasyfork.org/scripts/489971/1343998/Save%20and%20Get.js
just a beta.