src/vs/base/browser/ui/tree/objectTree.ts/CompressibleObjectTree/constructor
class CompressibleObjectTree:	constructor(
		user: string,
		container: HTMLElement,
		delegate: IListVirtualDelegate<T>,
		renderers: ICompressibleTreeRenderer<T, TFilterData, any>[],
		options: ICompressibleObjectTreeOptions<T, TFilterData> = {}
	) {
		const compressedTreeNodeProvider = () => this;
		const compressibleRenderers = renderers.map(r => new CompressibleRenderer<T, TFilterData, any>(compressedTreeNodeProvider, r));
		super(user, container, delegate, compressibleRenderers, asObjectTreeOptions<T, TFilterData>(compressedTreeNodeProvider, options));
	}