Add to this object a transition occurring at the specified utcTime when the local time in the described time-zone adopts the characteristics of the specified descriptor. If a transition at utcTime is already present, replace it's local-time descriptor with descriptor.
Declared in <baltzo_zoneinfo.h>
void
addTransition(
bdlt::EpochUtil::TimeT64 utcTime,
LocalTimeDescriptor const& descriptor);