src/vs/base/browser/ui/tree/compressedObjectTreeModel.ts/CompressedObjectTreeModel/constructor
class CompressedObjectTreeModel:	constructor(
		private user: string,
		list: IList<ITreeNode<ICompressedTreeNode<T>, TFilterData>>,
		options: ICompressedObjectTreeModelOptions<T, TFilterData> = {}
	) {
		this.model = new ObjectTreeModel(user, list, options);
		this.enabled = typeof options.compressionEnabled === 'undefined' ? true : options.compressionEnabled;
		this.identityProvider = options.identityProvider;
	}