code: public Map<String, AddOperation> getAddOperations() {
      Map<String, AddOperation> addOperations = new TreeMap<String, AddOperation>();
      for (Entry<String, IOperation> entry : collectionUpdateData.entrySet()) {
        String key = entry.getKey();
        IOperation op = entry.getValue();
        if (op.getOperationType().equals(Type.ADD)) {
          AddOperation aop = (AddOperation)op;
          if (null != aop.getDefaultValue()) {
            addOperations.put(key, aop);
          }
        }
      }
      return addOperations;
    }
docs: Returns a Map of ADD operations which have a non-null default value specified.
  
  @return Map of ADD operations which have a non-null  default value specified