{"ast_node_type":"variable","tokens":[{"end":53,"kind":"keyword","start":0,"text":"let"}]}
    let mut lines = buf.split(|&byte| byte == b'\n');
fn get_indented_section(buf: &[u8]) -> (&[u8], &[u8]) {
    let mut end = lines.next().map_or(0, |line| line.len());