@Override
        public <H extends EventHandler> HandlerRegistration addHandler(H handler, Type<H> type) {
            return hasData.addHandler(handler, type);
        }
Implementation of {@link HasDataPresenter.View} used by this widget.

@param <T> the data type of the view
stroom-core-client-widget/src/main/java/com/google/gwt/user/cellview/client/AbstractHasData.java