/**
* Function IntlTimeZone::getOffset()
* @link http://icu-project.org/apiref/icu4c/classicu_1_1TimeZone.html#afcbc1c48bf0b453b0123c4cb75d20e96
* @param float $date
* moment in time for which to return offsets, in units of milliseconds from
* January 1, 1970 0:00 GMT, either GMT time or local wall time, depending on
* `local'.
* @param bool $local
* if true, `date' is local wall time; otherwise it is in GMT time.
* @param int &$rawOffset
* output parameter to receive the raw offset, that is, the offset not
* including DST adjustments
* @param int &$dstOffset
* output parameter to receive the DST offset, that is, the offset to be added
* to `rawOffset' to obtain the total offset between local and GMT time. If
* DST is not in effect, this value is zero; otherwise it is a positive value,
* typically one hour.
*/