src/vs/base/browser/ui/breadcrumbs/breadcrumbsWidget.ts/BreadcrumbsWidget/_focus
class BreadcrumbsWidget:	private _focus(nth: number, payload: any): void {
		this._focusedItemIdx = -1;
		for (let i = 0; i < this._nodes.length; i++) {
			const node = this._nodes[i];
			if (i !== nth) {
				node.classList.remove('focused');
			} else {
				this._focusedItemIdx = i;
				node.classList.add('focused');
				node.focus();
			}
		}
		this._reveal(this._focusedItemIdx, true);
		this._onDidFocusItem.fire({ type: 'focus', item: this._items[this._focusedItemIdx], node: this._nodes[this._focusedItemIdx], payload });
	}