presto-spi/src/main/java/io/prestosql/spi/type/SqlTimeWithTimeZone.java/SqlTimeWithTimeZone/toString
class SqlTimeWithTimeZone:    @JsonValue
    @Override
    public String toString()
    {
        return Instant.ofEpochMilli(millisUtc)
                .atZone(ZoneId.of(timeZoneKey.getId()))
                .format(JSON_FORMATTER);
    }