{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":".chain(subtree_iter.remaining().flat_tokens().iter().cloned()),"}]}
                        .chain(subtree_iter.remaining().flat_tokens().iter().cloned()),
                    std::iter::once(crate::tt::TokenTree::Subtree(subtree.clone()))
                );