code: @Override
    public Long add11(Long arg1, Long arg2) {
      if (arg1 == null || arg2 == null) {
        return null;
      } else {
        return arg1 + arg2;
      }
    }
docs: /*
  (non-Javadoc)
  
  @see
  mtas.codec.util.DataCollector.MtasDataOperations#add11(java.lang.Number,
  java.lang.Number)