How to handler CellTable's CellPreviewEvent in @UiHandler way?

HI,

I have a problem to handler CellPreviewEvent in a UiBinder file, just
like the following way:
@UiHandler("cellTable")
void onCellTableCellPreview(CellPreviewEvent<Person> event) {

GWT.log(event.toDebugString());
}

When I try to load the module, I got the following error:

Field 'cellTable' does not have an 'addCellPreviewEvent.Handler'
method associated.

Is there something wrong what I did? or missed?

I will appreciate any ideas on this problem. Thanks.

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