compositeLayer.setChildLayer(GridRegion.COLUMN_HEADER,
filterRowHeaderLayer, 0, 0);
compositeLayer.setChildLayer(GridRegion.BODY, viewportLayer, 0, 1);
// add edit configurations
compositeLayer.addConfiguration(new DefaultEditConfiguration());
compositeLayer.addConfiguration(new DefaultEditBindings());
// add print support
compositeLayer.registerCommandHandler(new PrintCommandHandler(
compositeLayer));