package errhttp type HTTPVersionNotSupported interface { ServerError HTTPVersionNotSupported() } type internalHTTPVersionNotSupported struct { err error } func HTTPVersionNotSupportedWrap(err error) error { return internalHTTPVersionNotSupported{ err:err, } } func (receiver internalHTTPVersionNotSupported) Error() string { return receiver.err.Error() } func (receiver internalHTTPVersionNotSupported) Err() error { return receiver.err } func (internalHTTPVersionNotSupported) ServerError() { // Nothing here. } func (internalHTTPVersionNotSupported) HTTPVersionNotSupported() { // Nothing here. }