src/vs/base/browser/ui/tree/objectTree.ts/CompressibleRenderer/constructor
class CompressibleRenderer:	constructor(private _compressedTreeNodeProvider: () => ICompressedTreeNodeProvider<T, TFilterData>, private renderer: ICompressibleTreeRenderer<T, TFilterData, TTemplateData>) {
		this.templateId = renderer.templateId;

		if (renderer.onDidChangeTwistieState) {
			this.onDidChangeTwistieState = renderer.onDidChangeTwistieState;
		}
	}