Mine

/*
 * GroupTabBarSlot
 */
typedef struct _GroupTabBarSlot {
	int			rx;
	int			ry;
	int			height;
	int			width;

	CompWindow	*window;
} GroupTabBarSlot;

/*
 * GroupTabBar
 */
typedef struct _GroupTabBar {
	GroupTabBarSlot		**slots;
	int					nSlots;

	int					x;
	int					y;
	int					height;
	int					width;
} GroupTabBar;