rowHeaderLayer, cornerLayer);
final NatTable natTable = new NatTable(gridPanel, gridLayer, false);
// adding this configuration adds the styles and the painters to use
natTable.addConfiguration(new DefaultNatTableStyleConfiguration());
natTable.addConfiguration(new AbstractRegistryConfiguration() {
@Override
public void configureRegistry(IConfigRegistry configRegistry) {
PoiExcelExporter exporter = new HSSFExcelExporter();
exporter.setApplyVerticalTextConfiguration(true);