@class NSObject, NSMutableArray, NSXPCConnection; @protocol OS_dispatch_queue; @interface NWActivityXPC : NSObject @property (retain, nonatomic) NSXPCConnection *connection; @property (retain, nonatomic) NSObject<OS_dispatch_queue> *queue; @property (nonatomic) unsigned int qosClass; @property (retain, nonatomic) NSMutableArray *pendingCompletionHandlers; - (void)dealloc; - (void)start; - (id)description; - (void).cxx_destruct; - (void)cancel; - (id)initWithQueue:(id)a0 qosClass:(unsigned int)a1; - (void)retrieveMetricsForActivity:(unsigned char[16])a0 completion:(id /* block */)a1; @end