docs: private void clearUnusedPrecision() {
          switch (_precision) {
              case YEAR:
                  _month = 1;
              case MONTH:
                  _day = 1;
              case DAY:
                  _hour = 0;
                  _minute = 0;
              case MINUTE:
                  _second = 0;
                  _fraction = null;
              case SECOND:
          }
      }