-@property(readwrite) int usage;
-@property(readwrite) void* cookie;
-@property(readonly) int index;
-@property(copy) NSArray* subActions;
-@property(readwrite, strong) id base;
-@property(copy) NSString* name;
-@property(readonly) BOOL active;
+@property (nonatomic, assign) IOHIDElementCookie cookie;
+@property (nonatomic, copy) NSArray *children;
+@property (nonatomic, weak) id base;
+@property (nonatomic, copy) NSString *name;
+@property (nonatomic, assign) BOOL active;
+@property (nonatomic, readonly) float magnitude;
+@property (readonly) NSString *uid;