ArgumentCaptor<MouseOutHandler> captor = ArgumentCaptor
.forClass(MouseOutHandler.class);
verify(avatar, times(1)).addMouseOutHandler(captor.capture());
MouseOutHandler mouseOutHandler = captor.getValue();
mouseOutHandler.onMouseOut(mock(MouseOutEvent.class));
verify(hoverModel, times(1)).setHighlightedResourceSet(
((ResourceSet) isNull()));
}