flaminyogurt

For the most part I just want to say, "Why would you do this?" But I have to say this is actually a really cool project.

What is a global id?

Can someone explain to me the difference between to two methods listed in the title? When to use each one, and why each one is called? The both seem to do similar things, Ive looked at the forge code and the methods are different. I am confused as too what each one is used for and which one or both should be used to register entities properly. Also when to use findGlobalUniqueEntityID to find the id. The only code Ive been able to find either used one, both of the register methods and only sometimes uses the findGlobalUniqueEntityID method. What is the correct or at least most conventionally proper way to register an entity?