System/Library/Frameworks/WatchKit.framework

WKSPInterfaceGroup.h

NSObject
>
WKSPInterfaceObject

@interface WKSPInterfaceGroup : WKSPInterfaceObject

- (void)setBackgroundColor:(id)a0;
- (void)setBackgroundImage:(id)a0;
- (void)setBackgroundImageData:(id)a0;
- (void)setBackgroundImageNamed:(id)a0;

@end