io::ErrorKind::NotFound => IOError::NotFound,
io::ErrorKind::PermissionDenied => IOError::PermissionDenied,
io::ErrorKind::ConnectionRefused => IOError::ConnectionRefused,
io::ErrorKind::NotFound => IOError::NotFound,
io::ErrorKind::PermissionDenied => IOError::PermissionDenied,
io::ErrorKind::ConnectionRefused => IOError::ConnectionRefused,