@property (assign) int index;
@property (copy) NSString *productName;
@property (assign) IOHIDDeviceRef device;
@property (copy) NSArray *children;
@property (readonly) NSString *name;
@property (assign) int index;
@property (copy) NSString *productName;
@property (assign) IOHIDDeviceRef device;
@property (copy) NSArray *children;
@property (readonly) NSString *name;