{"ast_node_type":"variable","tokens":[{"end":97,"kind":"keyword","start":0,"text":"let"}]}
                    let preceding_chars_start = rest[..closing].rfind("\n").map_or(0, |i| i + 1);
                while let Some(closing) = rest.find("---") {
                    if rest[preceding_chars_start..closing].chars().all(is_whitespace) {