code: public Moment plus(MachineTime<SI> realTime) {
  
          return this.plus(realTime.getSeconds(), SI.SECONDS).plus(realTime.getFraction(), SI.NANOSECONDS);
  
      }
docs: /*[deutsch]
  <p>Addiert die angegebene Realzeit zur UTC-Zeit dieses Zeitstempels. </p>
  
  @param   realTime    real time defined in UTC time space
  @return  changed copy of this instance
  @throws  UnsupportedOperationException if either this moment or the result are before 1972
  @throws  ArithmeticException in case of overflow
  @since   3.23/4.19