For example, if you wanted to test the latest released code on https://www.sourcepoint.com you would go to https://www.sourcepoint.com?_sp_scriptVersion=latest
Note: When you use this parameter, you may see the following error in the developer console.
Uncaught Error: overridden
at HTMLScriptElement.<anonymous> (messaging.js:1)
This error can be ignored. It is generated by the process of replacing the exisiting code on the site with the latest version.