public Collection<PolopolyTest> getPolopolyItems() {
   Collection<PolopolyTest> items = new ArrayList<PolopolyTest>();
   for (TopLevelItem item : getItems()) {
     items.add(POLOPOLY_CONVENTIONS.createTestRepresentation(item));
   }
   return items;
 }
 /** Test if item matches the Polopoly test name convention. */
 @Override
 public boolean contains(TopLevelItem item) {
   return POLOPOLY_CONVENTIONS.isPolopolyTestJob(item);
 }