System/Library/PrivateFrameworks/FitnessUI.framework

FIUIChartBackgroundView.h

NSObject
>
UIResponder
>
UIView

@interface FIUIChartBackgroundView : UIView

@property (nonatomic) struct UIEdgeInsets { double top; double left; double bottom; double right; } lineInsets;

- (id)initWithFrame:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0;
- (struct CGSize { double x0; double x1; })sizeThatFits:(struct CGSize { double x0; double x1; })a0;

@end