text: //
  //     Generated by class-dump 3.5 (64 bit).
  //
  //     class-dump is Copyright (C) 1997-1998, 2000-2001, 2004-2013 by Steve Nygard.
  //
  
  #import "NSOperation.h"
  
  @class DVTDispatchLock, DVTObservingToken, NSError, NSMutableArray;
  
  @interface DVTOperation : NSOperation
  {
      CDUnknownBlockType _block;
      NSError *_error;
      DVTDispatchLock *_cancellationRegistrationLock;
      DVTDispatchLock *_cancellationBlockLock;
      NSMutableArray *_cancellationBlockTokens;
      DVTDispatchLock *_finishingLock;
      NSMutableArray *_finishingTokens;
      BOOL _preventFinish;
      DVTObservingToken *_isFinishedObserverToken;
      DVTObservingToken *_isExecutingObserverToken;
  }
  
  + (void)_trackStateChange:(id)arg1 ofOperation:(id)arg2 forKeyPath:(id)arg3;
  + (id)unfinishedOperations;
  + (id)operationWithBlock:(CDUnknownBlockType)arg1;
  @property BOOL preventFinish; // @synthesize preventFinish=_preventFinish;
  @property(copy) NSError *error; // @synthesize error=_error;
  @property(copy) CDUnknownBlockType block; // @synthesize block=_block;
  - (void).cxx_destruct;
  - (void)trackFuture:(id)arg1;
  - (void)trackFuture:(id)arg1 cancel:(BOOL)arg2 error:(BOOL)arg3;
  - (id)stateString;
  - (void)enumerateUsingBlock:(CDUnknownBlockType)arg1;
  - (void)_enumerateWithStop:(char *)arg1 usingBlock:(CDUnknownBlockType)arg2;
  - (void)allowFinishForToken:(id)arg1;
  - (id)disallowFinishWithReason:(id)arg1;
  - (BOOL)isFinished;
  - (void)cancel;
  - (BOOL)unregisterCancellationBlockForToken:(id)arg1;
  - (id)registerCancellationBlock:(CDUnknownBlockType)arg1;
  - (void)main;
  - (id)description;
  - (void)dealloc;
  - (id)init;
  
  @end
  
  