def uuid_to_uid(uuid)
      uuid = Integer(uuid)
      if uuid >= 0 && uuid <= MAX_UUID
        10_000 + uuid
      else
        raise RangeError, "#{uuid} is not within (0..#{MAX_UUID})"
      end
    end
def uuid_to_uid(uuid)
      uuid = Integer(uuid)
      if uuid >= 0 && uuid <= MAX_UUID
        10_000 + uuid
      else
        raise RangeError, "#{uuid} is not within (0..#{MAX_UUID})"
      end
    end
Map a universally-unique integer RightScale user ID to a locally-unique Unix UID.