code: public MonetaryRounding getRounding(String roundingName, String... providers) {
          MonetaryRounding op =
                  getRounding(RoundingQueryBuilder.of().setProviderNames(providers).setRoundingName(roundingName).build());
          if(op==null) {
              throw new MonetaryException("No rounding provided with rounding name: " + roundingName);
          }
          return op;
      }
docs: Access a {@link javax.money.MonetaryRounding} using the rounding name.
  
  @param roundingName The rounding name, not null.
  @param providers    the optional provider list and ordering to be used
  @return the corresponding {@link javax.money.MonetaryOperator} implementing the
  rounding, never {@code null}.
  @throws IllegalArgumentException if no such rounding is registered using a
  {@link javax.money.spi.RoundingProviderSpi} instance.