{"ast_node_type":"variable","tokens":[{"end":100,"kind":"keyword","start":0,"text":"if"}]}
    if let Ok(code) = upper_cased_code.strip_prefix('E').unwrap_or(&upper_cased_code).parse::<u32>()
    let upper_cased_code = code.to_ascii_uppercase();
        && code <= ErrCode::MAX_AS_U32