+ bool hasUtcOffset() const {return !value("utc_offset").isNull();}
+ int utcOffset() const {return value("utc_offset").toInt();}
+ bool hasDisplayTimeShift() const {return !value("display_time_shift").isNull();}
+ int displayTimeShift() const {return value("display_time_shift").toInt();}
+ void setDisplayTimeShift(int newValue) {setValue("display_time_shift", newValue); update("display_time_shift");}
+