{"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"mp.push_match(metavar_idx,"}]}
                        mp.push_match(metavar_idx, seq_depth, MatchedSeq(vec![]));
                    for metavar_idx in next_metavar..next_metavar + num_metavar_decls {
                    }