private void configureColumnCategoriesInChooser() {
DefaultBodyLayerStack bodyLayer = this.gridLayer.getBodyLayerStack();
ColumnCategoriesModel model = new ColumnCategoriesModelFixture();
bodyLayer
.registerCommandHandler(new ChooseColumnsFromCategoriesCommandHandler(
bodyLayer.getColumnHideShowLayer(), this.gridLayer
.getColumnHeaderLayerStack()
.getColumnHeaderLayer(), this.gridLayer
.getColumnHeaderLayerStack().getDataLayer(),
model));