Utilities library, utilities.getNewUUID()

I am looking at using the getNewUUID() fuction from the Utilities Library in some projects, and have been looking and reading up on them. Internet generated UUID’s, from uuidgenerator.net in a browser, they refer to Version 1, Version4, etc. How does the Utilities library compare, which type might it generate.
Thank you,

Version 4. See Utilities/utilities.lib.nut at master · electricimp/Utilities · GitHub and rfc4122.