Referencing this class directly is deprecated; it is now part of the implementation
of PersistentDataStoreBuilder and will be made
package-private starting in version 5.0.
As of version 4.10.0. In the next major release the SDK will no longer include the
LDCountryCode class. Applications should use LDUser.Builder.country(String) instead.
As of version 4.10.0. In the next major release the SDK will no longer include the
LDCountryCode class. Applications should use LDUser.Builder.privateCountry(String) instead.