gridLayer.getColumnHeaderLayer(), gridLayer.getBodyLayer()
.getSelectionLayer(), model);
columnGroupLayer.addColumnsIndexesToGroup(TEST_GROUP_NAME_1, 0, 1);
columnGroupLayer.addColumnsIndexesToGroup(TEST_GROUP_NAME_2, 5, 6);
columnGroupLayer.addColumnsIndexesToGroup(TEST_GROUP_NAME_3, 8, 9);
gridLayer.setClientAreaProvider(new IClientAreaProvider() {
@Override
public Rectangle getClientArea() {
return new Rectangle(0, 0, 1050, 250);
}