prop_to_from_intervals :: VersionIntervals -> Bool
prop_to_from_intervals intervals =
  toVersionIntervals (fromVersionIntervals intervals) == intervals
prop_to_from_intervals :: VersionIntervals -> Bool
prop_to_from_intervals intervals =
  toVersionIntervals (fromVersionIntervals intervals) == intervals
prop_to_from_intervals intervals =
  toVersionIntervals (fromVersionIntervals intervals) == intervals