/**
  * Returns the instance(s) connected to this instance through the role "ordered pairs".
  *
  * @return the connected instance(s)
  * @throws PDStoreException
  */
 public Collection<PDOrderedPair> getOrderedPairss() throws PDStoreException {
   Set<PDOrderedPair> result = new HashSet<PDOrderedPair>();
   GUID PDOrderedPairTypeId = new GUID("b3ba85348e0ede11980f9a097666e103");
   pdWorkingCopy.getInstances(
       this, roleOrderedPairsId, PDOrderedPair.class, PDOrderedPairTypeId, result);
   return result;
 }