code: public static String getToken(Bundle bundle) {
          Validate.notNull(bundle, "bundle");
          return bundle.getString(TOKEN_KEY);
      }
docs: Gets the cached token value from a Bundle.
  
  @param bundle
  A Bundle in which the token value was stored.
  @return the cached token value, or null.
  
  @throws NullPointerException if the passed in Bundle is null