src/vs/base/browser/ui/tree/asyncDataTree.ts/AsyncDataTreeRenderer/constructor
class AsyncDataTreeRenderer:	constructor(
		protected renderer: ITreeRenderer<T, TFilterData, TTemplateData>,
		protected nodeMapper: AsyncDataTreeNodeMapper<TInput, T, TFilterData>,
		readonly onDidChangeTwistieState: Event<IAsyncDataTreeNode<TInput, T>>
	) {
		this.templateId = renderer.templateId;
	}