@class DYTransportMessage, NSObject; @protocol OS_dispatch_queue; @interface BufferedSendOperation : NSObject @property (retain, nonatomic) DYTransportMessage *message; @property (retain, nonatomic) DYTransportMessage *replyTo; @property (retain, nonatomic) NSObject<OS_dispatch_queue> *queue; @property (nonatomic) unsigned long long timeout; @property (copy, nonatomic) id /* block */ replyBlock; - (void)dealloc; @end