You will need to install a user script manager extension to install this script.
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive
// @require https://greasyfork.org/scripts/429557-gmrequirechecker/code/GMRequireChecker.js?version=951692
GMRequiredJSLoadedwhich equals to true. Otherwise,
GMRequiredJSLoadedwill just not exist.