docs: public static Timestamp forSqlTimestampZ(java.sql.Timestamp sqlTimestamp)
      {
          if (sqlTimestamp == null) return null;
  
          long millis = sqlTimestamp.getTime();
          Timestamp ts = new Timestamp(millis, UTC_OFFSET);
          int nanos = sqlTimestamp.getNanos();
          BigDecimal frac = BigDecimal.valueOf(nanos).movePointLeft(9);
          ts._fraction = frac;
          return ts;
      }