LinkedHashSet<String> dependsNames = new LinkedHashSet<String>();
dependsNames.add("color");
dependsNames.add("shape");
dependsNames.add("number");
facetHandlers.add(new SimpleGroupbyFacetHandler("groupby", dependsNames));
ComboFacetHandler colorShape = new ComboFacetHandler("colorShape", new HashSet(
Arrays.asList(new String[] { "color", "shape" })));
ComboFacetHandler colorShapeMultinum = new ComboFacetHandler("colorShapeMultinum", new HashSet(
Arrays.asList(new String[] { "color", "shape", "multinum" })));