@class NSError, NSString, NSMutableDictionary, PBCodable, NSDictionary, NSObject, NSMutableSet, SYService;
@protocol OS_os_transaction, SYSessionDelegate, OS_dispatch_queue, SYChangeSerializer;

@interface SYSession : NSObject <SYChangeSerializer, SYStateLoggable> {
    NSObject<OS_dispatch_queue> *_delegateQueue;
    _Atomic BOOL _inTransaction;
    NSObject<OS_os_transaction> *_transaction;
    _Atomic BOOL _paused;
    NSMutableSet *_pendingMessageIDs;
    BOOL _rejectedNewSessionFromSamePeer;
    BOOL _sessionStarted;
    NSMutableDictionary *_stateResponders;
    struct os_unfair_lock_s { unsigned int _os_unfair_lock_opaque; } _setDelegateLock;
}

@property (readonly) NSObject<OS_dispatch_queue> *queue;
@property unsigned int state;
@property (copy, nonatomic) NSString *identifier;
@property (nonatomic) double birthDate;
@property (readonly, nonatomic) NSDictionary *wrappedUserContext;
@property (readonly, nonatomic) double remainingSessionTime;
@property (nonatomic) unsigned long long sessionSignpost;
@property (copy, nonatomic) NSMutableDictionary *peerGenerationIDs;
@property (readonly, nonatomic) unsigned long long protocolVersion;
@property (nonatomic) long long priority;
@property (weak, nonatomic) id<SYSessionDelegate> delegate;
@property (retain, nonatomic) NSObject<OS_dispatch_queue> *targetQueue;
@property (retain, nonatomic) id<SYChangeSerializer> serializer;
@property (readonly, weak, nonatomic) SYService *service;
@property (retain, nonatomic) NSString *reason;
@property (nonatomic) double perMessageTimeout;
@property (nonatomic) double fullSessionTimeout;
@property (copy, nonatomic) NSDictionary *options;
@property (nonatomic) long long maxConcurrentMessages;
@property (retain, nonatomic) NSError *error;
@property BOOL canRestart;
@property BOOL canRollback;
@property (readonly, nonatomic) BOOL isSending;
@property (readonly) BOOL isResetSync;
@property (readonly) BOOL wasCancelled;
@property (retain, nonatomic) NSDictionary *userContext;
@property (copy, nonatomic) NSDictionary *sessionMetadata;
@property (readonly, nonatomic) unsigned long long sentChangeByteCount;
@property (readonly, nonatomic) unsigned long long sentChangeCount;
@property (readonly) unsigned long long hash;
@property (readonly) Class superclass;
@property (readonly, copy) NSString *description;
@property (readonly, copy) NSString *debugDescription;
@property (readonly, nonatomic) PBCodable *stateForLogging;

+ (id)allocWithZone:(struct _NSZone { } *)a0;
+ (id)unarchiveMetadata:(id)a0;

- (BOOL)_endTransaction;
- (BOOL)_handleEndSessionResponse:(id)a0 error:(id *)a1;
- (void)dealloc;
- (BOOL)_handleSyncBatchResponse:(id)a0 error:(id *)a1;
- (void)start:(id /* block */)a0;
- (void)_handleError:(id)a0;
- (BOOL)_handleRestartSessionResponse:(id)a0 error:(id *)a1;
- (id)initWithService:(id)a0;
- (BOOL)_handleStartSessionResponse:(id)a0 error:(id *)a1;
- (void).cxx_destruct;
- (BOOL)_beginTransaction;
- (void)cancel;
- (void)_pause;
- (void)cancelWithError:(id)a0;
- (id)CPSafeDescription;
- (id)dataFromChange:(id)a0;
- (id)changeFromData:(id)a0 ofType:(long long)a1;
- (id)decodeChangeData:(id)a0 fromProtocolVersion:(long long)a1 ofType:(long long)a2;
- (id)encodeSYChangeForBackwardCompatibility:(id)a0 protocolVersion:(long long)a1;
- (void)_continue;
- (BOOL)_readyToProcessIncomingMessages;
- (id)stateResponders;
- (void)didStartSession;
- (id)_cancelPendingMessagesReturningFailures;
- (void)_clearOutgoingMessageUUID:(id)a0;
- (void)_handleEndSession:(id)a0 response:(id)a1 completion:(id /* block */)a2;
- (void)_handleRestartSession:(id)a0 response:(id)a1 completion:(id /* block */)a2;
- (void)_handleSyncBatch:(id)a0 response:(id)a1 completion:(id /* block */)a2;
- (void)_onSessionStateChangedTo:(unsigned int)a0 do:(id /* block */)a1;
- (void)_peerProcessedMessageWithIdentifier:(id)a0 userInfo:(id)a1;
- (void)_recordOutgoingMessageUUID:(id)a0;
- (void)_resolvedIdentifier:(id)a0 forResponse:(id)a1;
- (void)_resolvedIdentifierForRequest:(id)a0;
- (void)_sentMessageWithIdentifier:(id)a0 userInfo:(id)a1;
- (void)_setStateQuietly:(unsigned int)a0;
- (void)_supercededWithSession:(id)a0;
- (BOOL)_willAcquiesceToNewSessionFromPeer:(id)a0;
- (id)combinedEngineOptions:(id)a0;
- (void)didCompleteSession;
- (BOOL)hasRejectedPeerSession;
- (void)setHasRejectedPeerSession:(BOOL)a0;

@end