@class NTKSnapshotRequest; @interface NTKSnapshotToken : NSObject { struct os_unfair_lock_s { unsigned int _os_unfair_lock_opaque; } _lock; unsigned long long _lock_priority; id /* block */ _callback; NTKSnapshotRequest *_request; } @property (nonatomic) unsigned long long priority; - (id /* block */)callback; - (void)setRequest:(id)a0; - (void)dealloc; - (void).cxx_destruct; - (id)initWithPriority:(unsigned long long)a0 callback:(id /* block */)a1; - (void)stopObservingCallbacks; @end