You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: jws.go
    path of file: ./repos/oauth2/jws
    
    the code of the file until where you have to start completion: // Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Package jws provides a partial implementation
// of JSON Web Signature encoding and decoding.
// It exists to support the golang.org/x/oauth2 package.
//
// See RFC 7515.
//
// 
    
func Verify(token string, key *rsa.PublicKey) error {
	parts := strings.Split(token, ".")
	if len(parts) != 3 {
		return errors.New("jws: invalid token received, token must have 3 parts")
	}

	signedContent := parts[0] + "." + parts[1]
	signatureString, err := base64.RawURLEncoding.DecodeString(parts[2])
	if err != nil {
		return err
	}

	h := sha256.New()
	h.Write([]byte(signedContent))
	return rsa.VerifyPKCS1v15(key, crypto.SHA256, h.Sum(nil), signatureString)
}