public long add(long instant, long value) {
if (iTimeField) {
int offset = getOffsetToAdd(instant);
long localInstant = iField.add(instant + offset, value);
return localInstant - offset;
} else {
long localInstant = iZone.convertUTCToLocal(instant);
localInstant = iField.add(localInstant, value);
return iZone.convertLocalToUTC(localInstant, false, instant);
}
}
