{"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"assert!((2..=4).contains(&char_len));"}]}
                assert!((2..=4).contains(&char_len));
            if char_len > 1 {
                let mbc = WideChar { start: pos, end: pos + TextSize::from(char_len as u32) };