docs: protected void setValue(int newPosition, T1[] values, int number,
        boolean currentExisting) {
      if (number > 0) {
        T1 valueSum = null;
        for (int i = 0; i < number; i++) {
          valueSum = (i == 0) ? values[i] : operations.add11(valueSum, values[i]);
        }
        if (currentExisting) {
          newBasicValueSumList[newPosition] = operations
              .add11(newBasicValueSumList[newPosition], valueSum);
          newBasicValueNList[newPosition] += number;
        } else {
          newBasicValueSumList[newPosition] = valueSum;
          newBasicValueNList[newPosition] = number;
        }
      }
    }