code: private void tryRegisterJava8() {
          try {
              tryRegister("java.time.Instant", "parse");
              tryRegister("java.time.Duration", "parse");
              tryRegister("java.time.LocalDate", "parse");
              tryRegister("java.time.LocalTime", "parse");
              tryRegister("java.time.LocalDateTime", "parse");
              tryRegister("java.time.OffsetTime", "parse");
              tryRegister("java.time.OffsetDateTime", "parse");
              tryRegister("java.time.ZonedDateTime", "parse");
              tryRegister("java.time.Year", "parse");
              tryRegister("java.time.YearMonth", "parse");
              tryRegister("java.time.MonthDay", "parse");
              tryRegister("java.time.Period", "parse");
              tryRegister("java.time.ZoneOffset", "of");
              tryRegister("java.time.ZoneId", "of");
              tryRegister("java.time.ZoneRegion", "of");
  
          } catch (Throwable ex) {
              if (LOG) {
                  System.err.println("tryRegisterJava8: " + ex);
              }
          }
      }
docs: Tries to register Java 8 classes.