@interface HKXPCEventObserver : NSObject + (void)_registerEventHandler:(id /* block */)a0 forStream:(const char *)a1; + (void)_unsubscribeFromStream:(const char *)a0 clientIdentifier:(const char *)a1; + (void)setAuthorizationStreamEventHandler:(id /* block */)a0; + (void)unsubscribeFromAuthorizationStreamWithIdentifier:(const char *)a0; + (void)subscribeToAuthorizationStreamWithIdentifier:(const char *)a0; + (void)_subscribeToStream:(const char *)a0 clientIdentifier:(const char *)a1; @end