For World.doSubscription, chances actually seem very good that the generated key will provide enough uniqueness without a user-provided name.

[bryanedds]

Looking at how ImNui programs shape up in practice, I don't really see many legitimate scenarios where the user-provided name for World.doSubscription will actually be needed. If this can be determined to be true and we can be sure we generate useful errors in the cases the generated keys are non-unique, we might just remove the name parameter entirely.