[Pharo-project] How to dispatch mouseWheel?

Hello all, I've been happily using #handlesMouseWheel: and #mouseWheel until I had to "ousource" parts of my Morph to a Submorph for layout reasons. The part which shall respond to mouseWheel is no longer the Morph itself but a Submorph thereof. Of course this Submorph does not respond to mouseWheel, because all the wheely stuff is defined at class level in its owner's class. So I thought I could just tell this stupid little Moph to let its owner handle the mouse stuff. But there does not seem to be a way to use on:send:to with mouseWheel. Is there a way around this problem. Or is there another way to "just do layout" whithout interfering with the event handling? -- Martin