xpWrap (from_tuple, to_tuple) $
xp11Tuple (-- I can't think of another way to get both the
-- TrackLength and its KPH attribute. So we shove them
xpWrap (from_tuple, to_tuple) $
xp11Tuple (-- I can't think of another way to get both the
-- TrackLength and its KPH attribute. So we shove them