code: @Override
    public Long product11(Long arg1, Long arg2) {
      if (arg1 == null || arg2 == null) {
        return null;
      } else {
        return arg1 * arg2;
      }
    }
docs: /*
  (non-Javadoc)
  
  @see mtas.codec.util.DataCollector.MtasDataOperations#product11(java.lang.
  Number, java.lang.Number)