This exposes LifetimeOffset from DrawableHitObject which is used by the XSRG rulesets to adjust the life time range by the VisibleTimeRange.
# Conflicts: # osu.Game.Rulesets.Mania/Objects/Drawables/DrawableHoldNote.cs # osu.Game.Rulesets.Mania/Objects/Drawables/DrawableManiaHitObject.cs