code: public static Duration.Formatter<IsoUnit> formatter(String pattern) {
  
          return Duration.Formatter.ofPattern(pattern);
  
      }
docs: /*[deutsch]
  <p>&Auml;quivalent zu {@link net.time4j.Duration.Formatter#ofPattern(String)}. </p>
  
  @param   pattern format pattern
  @return  new formatter instance
  @throws  IllegalArgumentException in any case of pattern inconsistencies or failures
  @since   3.0