code: public static GoogleIdToken parse(JsonFactory jsonFactory, String idTokenString)
        throws IOException {
      JsonWebSignature jws =
          JsonWebSignature.parser(jsonFactory).setPayloadClass(Payload.class).parse(idTokenString);
      return new GoogleIdToken(jws.getHeader(), (Payload) jws.getPayload(), jws.getSignatureBytes(),
          jws.getSignedContentBytes());
    }
docs: Parses the given ID token string and returns the parsed {@link GoogleIdToken}.
  
  @param jsonFactory JSON factory
  @param idTokenString ID token string
  @return parsed Google ID token