{"ast_node_type":"variable","tokens":[{"end":42,"kind":"keyword","start":0,"text":"if"}]}
            if let Some(line) = line_opt {
            let (lo, hi_opt) = (lo.col.to_usize(), hi_opt.map(|hi| hi.col.to_usize()));
                if let Some(lo) = line.char_indices().map(|(i, _)| i).nth(lo) {