src/vs/workbench/api/browser/mainThreadTreeViews.ts/MainThreadTreeViews/$setBadge
class MainThreadTreeViews:	$setBadge(treeViewId: string, badge: IViewBadge | undefined): void {
		this.logService.trace('MainThreadTreeViews#$setBadge', treeViewId, badge?.value, badge?.tooltip);

		const viewer = this.getTreeView(treeViewId);
		if (viewer) {
			viewer.badge = badge;
		}
	}