{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"append.insert(for_token.into(),"}]}
                        append.insert(for_token.into(), vec![pat, in_token, iter]);
                    if it.pat().is_none() && it.in_token().is_none() && it.iterable().is_none() {
                    // does something funky -- see test case for_no_pat