{"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"writeln!(buf,"}]}
                writeln!(buf, "{}", &to_write[..ws_idx])?;
                    iter.find(|(_, ch)| ch.is_whitespace()).map_or(to_write.len(), |(idx, _)| idx);
                to_write = to_write.get(ws_idx + 1..).map_or("", str::trim_start);