src/vs/base/browser/ui/breadcrumbs/breadcrumbsWidget.ts/BreadcrumbsWidget/domFocus
class BreadcrumbsWidget:	domFocus(): void {
		let idx = this._focusedItemIdx >= 0 ? this._focusedItemIdx : this._items.length - 1;
		if (idx >= 0 && idx < this._items.length) {
			this._focus(idx, undefined);
		} else {
			this._domNode.focus();
		}
	}