const OldestVersion = "v1"
OldestVersion is the string that represents the oldest server version supported, for client code that wants to hardcode the lowest common denominator.
const Version = "v1"
Version is the string that represents the current external default version.
Versions is the list of versions that are recognized in code. The order provided may be assumed to be least feature rich to most feature rich, and clients may choose to prefer the latter items in the list over the former items when presented with a set of versions to choose.