code: public Set<Node> getAffectedNodes() {
          Set<Node> res = new HashSet<Node>();
          for(IntIterator it = getNewSubsumptions().keyIterator(); 
                          it.hasNext(); ) {
              String key = factory.lookupConceptId(it.next()).toString();
              Node n = conceptNodeIndex.get(key);
              if(n != null) {
                  res.add(n);
              } else {
                  log.debug("Could not find node for key " + key);
              }
          }
          for(IntIterator it = getAffectedSubsumptions().keyIterator(); 
                          it.hasNext(); ) {
              String key = factory.lookupConceptId(it.next()).toString();
              Node n = conceptNodeIndex.get(key);
              if(n != null) {
                  res.add(n);
              } else {
                  log.debug("Could not find node for key " + key);
              }
          }
          return res;
      }
docs: Returns a {@link Set} of {@link Node}s potentially affected by an
  incremental classification.
  
  @return