{"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"if"}]}
    if let Some(line) = line.strip_prefix(prefix) {
fn parse_media_block<'a>(line: &'a str, prefix: &str) -> Option<(&'a str, &'a str)> {
        if let Some((url, rest)) = line.split_once('[') {