@interface DAChangeHistoryClerk : NSObject + (id)clerkWithAddressBook:(void *)a0; + (id)clerkWithContactStore:(id)a0; - (id)identifiersOfAllRegisterdClients; - (void)registerClientWithIdentifier:(id)a0 forContainer:(id)a1; - (void)unregisterClientWithIdentifier:(id)a0 forContainer:(id)a1; @end