@Override
        public void setLoadingState(LoadingState state) {
            hasData.isRefreshing = true;
            hasData.onLoadingStateChanged(state);
            hasData.isRefreshing = false;
        }
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