*/
private void setVarsAsListGridFields(ArrayList<String> vars) {
ArrayList<ListGridField> listGridFields = new ArrayList<ListGridField>();
for(final String var: vars){
ListGridField field = new ListGridField(var, var);
field.setSortNormalizer(new SortNormalizer(){
public Object normalize(ListGridRecord record, String fieldName) {
HashMap<String, HashMap<String, String>> bindings = solutions.get(record.getAttributeAsInt(SOLUTION_ATTRIBUTE));
HashMap<String, String> binding = bindings.get(fieldName);
return binding.get("value");
}});