code: public static final Function<BigDecimal,String> toCurrencyStr(String locale, boolean groupingUsed) {
          return (Function<BigDecimal,String>)((Function)FnNumber.toCurrencyStr(locale, groupingUsed));
      }
docs: <p>
  It returns the {@link String} representation of the target as a currency in the
  given locale
  </p>
  
  @param locale the locale to be used
  @param groupingUsed whether or not grouping will be used
  @return the {@link String} representation of the input as a currency