System/Library/PrivateFrameworks/HealthUI.framework

_SpacingView.h

NSObject
>
UIResponder
>
UIView

@interface _SpacingView : UIView

@property (readonly) struct CGSize { double width; double height; } spacingSize;

- (id)initWithWidth:(double)a0 height:(double)a1;
- (struct CGSize { double x0; double x1; })intrinsicContentSize;

@end