func IsProxyConnectError(err error) bool {
	err = errors.Cause(err)
	_, ok := err.(*proxyConnectError)
	return ok
}
// IsProxyConnectError reports whether err
// was created with NewProxyConnectError.
IsProxyConnectError reports whether err
was created with NewProxyConnectError.
// IsProxyConnectError reports whether err // was created with NewProxyConnectError .
func IsProxyConnectError(err error) bool {
	err = errors.Cause(err)
	_, ok := err.(*proxyConnectError)
	return ok
}
func IsProxyConnectError ( err error ) bool { err = errors . Cause ( err ) _ , ok := err . ( * proxyConnectError ) return ok }
IsProxyConnectError reports whether err
was created with NewProxyConnectError.
IsProxyConnectError reports whether err was created with NewProxyConnectError .