src/vs/platform/theme/common/styler.ts/attachBadgeStyler
export function attachBadgeStyler(widget: IThemable, themeService: IThemeService, style?: IBadgeStyleOverrides): IDisposable {
	return attachStyler(themeService, {
		badgeBackground: style?.badgeBackground || badgeBackground,
		badgeForeground: style?.badgeForeground || badgeForeground,
		badgeBorder: contrastBorder
	} as IBadgeStyleOverrides, widget);
}