@Override
    public void refresh() {
        if (!initialised) {
            initialised = true;
            dataProvider.addDataDisplay(dataGrid);
        } else {
            dataProvider.refresh();
        }
    }
@return The effective criteria taking into account the active filter and any
row selections.
stroom-core-client/src/main/java/stroom/data/client/presenter/AbstractMetaListPresenter.java