src/vs/base/browser/ui/countBadge/countBadge.ts/CountBadge/applyStyles
class CountBadge:	private applyStyles(): void {
		if (this.element) {
			const background = this.badgeBackground ? this.badgeBackground.toString() : '';
			const foreground = this.badgeForeground ? this.badgeForeground.toString() : '';
			const border = this.badgeBorder ? this.badgeBorder.toString() : '';

			this.element.style.backgroundColor = background;
			this.element.style.color = foreground;

			this.element.style.borderWidth = border ? '1px' : '';
			this.element.style.borderStyle = border ? 'solid' : '';
			this.element.style.borderColor = border;
		}
	}