@class NSURLAuthenticationChallenge, NSOperationQueue;
@interface NSURLDownloadInternal : NSObject {
struct _CFURLDownload { } *cfDownload;
struct _CFURLAuthChallenge { } *currCFChallenge;
NSURLAuthenticationChallenge *currNSChallenge;
id delegate;
BOOL downloadActive;
NSOperationQueue *_targetQueue;
}
- (void)dealloc;
@end