code: public IConceptMap<IConceptSet> getAffectedSubsumptions() {
          int size = 0;
          for (Context ctx : affectedContexts) {
              if (ctx.hasNewSubsumptions()) {
                  size++;
              }
          }
  
          IConceptMap<IConceptSet> res = new DenseConceptMap<IConceptSet>(size);
          // Collect subsumptions from affected contexts
          for (IntIterator it = contextIndex.keyIterator(); it.hasNext();) {
              int key = it.next();
              Context ctx = contextIndex.get(key);
              if (ctx.hasNewSubsumptions()) {
                  res.put(key, ctx.getS());
              }
          }
          return res;
      }
docs: Returns the subsumptions for the existing concepts that have additional
  subsumptions due to the axioms added in an incremental classification.
  
  @return