src/vs/base/browser/ui/countBadge/countBadge.ts/CountBadge/constructor
class CountBadge:	constructor(container: HTMLElement, options?: ICountBadgeOptions) {
		this.options = options || Object.create(null);
		mixin(this.options, defaultOpts, false);

		this.badgeBackground = this.options.badgeBackground;
		this.badgeForeground = this.options.badgeForeground;
		this.badgeBorder = this.options.badgeBorder;

		this.element = append(container, $('.monaco-count-badge'));
		this.countFormat = this.options.countFormat || '{0}';
		this.titleFormat = this.options.titleFormat || '';
		this.setCount(this.options.count || 0);
	}