@interface _UICalloutBarButtonMetrics : NSObject @property (readonly, nonatomic) double height; @property (readonly, nonatomic) double horizontalPadding; @property (readonly, nonatomic) double imageWidth; @property (readonly, nonatomic) double minimumTitleAndImageSpacing; @property (readonly, nonatomic) BOOL prefersCustomSelection; @property (readonly, nonatomic) double cornerRadius; - (id)init; @end