Automatic adjustment of keyframes to GlobalIn/GlobalOut?

I have a macro node, that implements some simple effect. The effect is keyframed with a spline curve as usual. Now if I change the node's GlobalIn/GlobalOut, the spline will not change and will become out of alignment. Is there a way to have the spline curve somehow tied to GlobalIn/GlobalOut points, so that adjusting them will stretch/align the keyframing curve accordingly?

afaik you cant do that