code: public static PlainTime from(WallTime time) {
  
          if (time instanceof PlainTime) {
              return (PlainTime) time;
          } else if (time instanceof PlainTimestamp) {
              return ((PlainTimestamp) time).getWallTime();
          } else {
              return PlainTime.of(
                  time.getHour(),
                  time.getMinute(),
                  time.getSecond(),
                  time.getNanosecond());
          }
  
      }
docs: /*[deutsch]
  <p>Allgemeine Konversionsmethode. </p>
  
  @param   time    ISO-time
  @return  PlainTime