trySplitRPathOnLast (L1.L1RelPath rpss l) = Just (L1.L1RelPath rpss (init l), last l)
trySplitRPathOnLast (L1.L1RelPath rpss l) = Just (L1.L1RelPath rpss (init l), last l)
trySplitRPathOnLast (L1.L1RelPath rpss l) = Just (L1.L1RelPath rpss (init l), last l)