import "github.com/calmh/syncthing/xdr" func decodeData(data []byte) { reader := xdr.NewReader(data) // try to decode the data _, err := reader.ReadSomeData() if err != nil { if re, ok := err.(*xdr.ReaderError); ok { // Handle the reader error in some way } else { // Handle the error as a generic error } } }In this example, we are using a `Reader` object from the `xdr` package to attempt to read and decode some serialized data. If an error occurs during this process, we check to see if it is a `ReaderError` specifically. If so, we can handle it in a specialized way (for example, by logging extra information or attempting to recover). If it is not a `ReaderError`, we handle it as a more generic error. Overall, it seems that the `github.com/calmh/syncthing/xdr` package provides functionality for encoding and decoding data structures using the XDR standard. The `ReaderError` type is used to represent errors that occur during the decoding process.