gwt canvas reload causes lost focus

I am doing a reload of the GwtCanvas and am losing current mouse focus
on unrelated input.
I am wondering if I could ask some (perhaps global) object for the
current focus and then just restore it. But I didnt see anything like
Window.getCurrentObjectInFocus() or whatever. Is there some way to do
this? I'd hate to keep track of the focus manually to restore it.

thx for any ideas.

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