src/vs/base/browser/ui/tree/compressedObjectTreeModel.ts/CompressedObjectTreeModel/getNode
class CompressedObjectTreeModel:	getNode(location?: T | null | undefined): ITreeNode<ICompressedTreeNode<T> | null, TFilterData> {
		if (typeof location === 'undefined') {
			return this.model.getNode();
		}

		const node = this.getCompressedNode(location);
		return this.model.getNode(node);
	}