src/vs/workbench/browser/parts/editor/breadcrumbsPicker.ts/BreadcrumbsPicker/dispose
class BreadcrumbsPicker:	dispose(): void {
		this._disposables.dispose();
		this._previewDispoables.dispose();
		this._onWillPickElement.dispose();
		this._domNode.remove();
		setTimeout(() => this._tree.dispose(), 0); // tree cannot be disposed while being opened...
	}