code: @Override
    public Double max11(Double arg1, Double arg2) {
      if (arg1 == null || arg2 == null) {
        return Double.NaN;
      } else {
        return Math.max(arg1, arg2);
      }
    }
docs: /*
  (non-Javadoc)
  
  @see
  mtas.codec.util.DataCollector.MtasDataOperations#max11(java.lang.Number,
  java.lang.Number)