code: public void setMinimumFractionDigits (@Nonnegative final int nDecimals)
    {
      ValueEnforcer.isGE0 (nDecimals, "Decimals");
      m_aCurrencyFormat.setMinimumFractionDigits (nDecimals);
      m_aValueFormat.setMinimumFractionDigits (nDecimals);
    }
docs: Set the minimum fraction digits to be used for formatting. Applies to the
  currency-formatting and the value-formatting.
  
  @param nDecimals
  The new minimum fraction digits. May not be negative.