On Apple's documentation of the Contacts Framework for iOS and Swift on their developer website, there is a section called Change History Data.
It consists of a list of classes and one protocol. The protocol seems to be the most important item of the list - the CNChangeHistoryEventVisitor protocol. The protocol apparently has instance methods each of which use one of those classes listed.
Where do I find documentation to use this protocol and these classes?
Anyone ever use these before?
Here's the list:
class CNChangeHistoryAddContactEvent class CNChangeHistoryAddGroupEvent class CNChangeHistoryAddMemberToGroupEvent class CNChangeHistoryAddSubgroupToGroupEvent class CNChangeHistoryDeleteContactEvent class CNChangeHistoryDeleteGroupEvent class CNChangeHistoryDropEverythingEvent class CNChangeHistoryEvent class CNChangeHistoryFetchRequest class CNChangeHistoryRemoveMemberFromGroupEvent class CNChangeHistoryRemoveSubgroupFromGroupEvent class CNChangeHistoryUpdateContactEvent class CNChangeHistoryUpdateGroupEvent protocol CNChangeHistoryEventVisitor
