presto-spi/src/main/java/io/prestosql/spi/type/DateTimeEncoding.java/DateTimeEncoding/packDateTimeWithZone
class DateTimeEncoding:    public static long packDateTimeWithZone(long millisUtc, TimeZoneKey timeZoneKey)
    {
        requireNonNull(timeZoneKey, "timeZoneKey is null");
        return pack(millisUtc, timeZoneKey.getKey());
    }