System/Library/PrivateFrameworks/BookUtility.framework
BUOSStateHandler.h
@interface BUOSStateHandler : NSObject
@property (nonatomic) unsigned long long osStateHandle;
- (void)dealloc;
- (id)initWithTitle:(id)a0 queue:(id)a1 block:(id /* block */)a2;
- (id)initWithTitle:(id)a0 block:(id /* block */)a1;
@end