code: function (hasher) {
              return function (message, key) {
                  return new C_algo.HMAC.init(hasher, key).finalize(message);
              };
          }
docs: Creates a shortcut function to the HMAC's object interface.
  
  @param {Hasher} hasher The hasher to use in this HMAC helper.
  
  @return {Function} The shortcut function.
  
  @static
  
  @example
  
  var HmacSHA256 = CryptoJS.lib.Hasher._createHmacHelper(CryptoJS.algo.SHA256);