Registers a zone rules provider.
!(p)
This adds a new provider to those currently available.
A provider supplies rules for one or more zone IDs.
A provider cannot be registered if it supplies a zone ID that has already been
registered. See the notes on time-zone IDs _in {@link ZoneId}, especially
the section on using the concept of a "group" to make IDs unique.
!(p)
To ensure the integrity of time-zones already created, there is no way
to deregister providers.
@param provider the provider to register, not null
@throws ZoneRulesException if a zone ID is already registered
Registers a zone rules provider. !(p) This adds a new provider to those currently available. A provider supplies rules for one or more zone IDs. A provider cannot be registered if it supplies a zone ID that has already been registered. See the notes on time-zone IDs _in {@link ZoneId}, especially the section on using the concept of a "group" to make IDs unique. !(p) To ensure the integrity of time-zones already created, there is no way to deregister providers.
@param provider the provider to register, not null @throws ZoneRulesException if a zone ID is already registered