{"ast_node_type":"variable","tokens":[{"end":62,"kind":"keyword","start":0,"text":"let"}]}
        let msg = "file locks not supported on this platform";
    pub fn new(_p: &Path, _wait: bool, _create: bool, _exclusive: bool) -> io::Result<Lock> {
        Err(io::Error::new(io::ErrorKind::Other, msg))