code: public static BendableBigDecimalScore zero(int hardLevelsSize, int softLevelsSize) {
          BigDecimal[] hardScores = new BigDecimal[hardLevelsSize];
          Arrays.fill(hardScores, BigDecimal.ZERO);
          BigDecimal[] softScores = new BigDecimal[softLevelsSize];
          Arrays.fill(softScores, BigDecimal.ZERO);
          return new BendableBigDecimalScore(0, hardScores, softScores);
      }
docs: Creates a new {@link BendableBigDecimalScore}.
  @param hardLevelsSize at least 0
  @param softLevelsSize at least 0
  @return never null