shallowClone method
Create a shallow clone of the current node.
any children of the node are included skeletoized.
@return the cloned node @throws StorageException if the storage backend encounters a problemImplementation
@override
Future<Node> shallowClone() async {
Node ret = await NodeImpl.fromPath(path, owner);
await ret.update(this, deepClone: false);
return ret;
}