code: public CurrencyQueryBuilder setNumericCodes(int... codes) {
          return set(CurrencyQuery.KEY_QUERY_NUMERIC_CODES,
                  Arrays.stream(codes).boxed().collect(Collectors.toList()));
      }
docs: Set the numeric code. Setting it to -1 search for currencies that have no numeric code.
  
  @param codes the numeric codes.
  @return the query for chaining.