@interface CNContactVCardSerialization : NSObject + (id)descriptorForRequiredKeys; + (id)dataWithContacts:(id)a0 error:(id *)a1; + (void)contactsWithData:(id)a0 scheduler:(id)a1 completionHandler:(id /* block */)a2; + (id)contactsWithData:(id)a0 error:(id *)a1; + (id)dataWithContacts:(id)a0 options:(id)a1 error:(id *)a2; + (id)descriptorForRequiredKeysWithOptions:(id)a0; + (id)dataWithContacts:(id)a0 options:(id)a1 error:(id *)a2 environment:(id)a3; + (void)contactsWithData:(id)a0 completionHandler:(id /* block */)a1; + (void)dataWithContacts:(id)a0 options:(id)a1 scheduler:(id)a2 completionHandler:(id /* block */)a3; + (id)summaryOfVCard:(id)a0 error:(id *)a1; + (id)summaryOfLocationVCard:(id)a0 error:(id *)a1; + (id)contactsWithMECARDString:(id)a0 error:(id *)a1; + (void)dataWithContacts:(id)a0 options:(id)a1 completionHandler:(id /* block */)a2; + (id)descriptorForRequiredKeysWithOptions:(id)a0 description:(id)a1; + (void)logWritingContactsToVCard:(id)a0 options:(id)a1 logger:(id)a2; + (id)contactsWithData:(id)a0 options:(id)a1 error:(id *)a2; @end