code: public static CalendarMonth from(YearMonth yearMonth) {
  
          return CalendarMonth.of(yearMonth.getYear(), yearMonth.getMonthValue());
  
      }
docs: /*[deutsch]
  <p>Konvertiert den angegebenen JSR-310-Typ zu einem Kalendermonat. </p>
  
  @param   yearMonth   Threeten-equivalent of this instance
  @return  CalendarMonth
  @see     #toTemporalAccessor()