PowerVault ME4084 snapshot question

In the admin guide for the ME4 series it says "You cannot expand the base volume of a snapshot tree or any snapshots in the tree." From this statement it sounds like a volume that has snapshots cannot be expanded unless those snapshots are first deleted. Am I correct?

In the admin guide for the ME5 series it says "You can expand the base volume of a snapshot tree, but you cannot expand any snapshots in the tree."

Is expanding the base volume of a snapshot tree a new feature in the ME5 series, or is this a print error in the guide? Or is it a feature that is available with the latest firmware?

Thanks.