Identity = function Identity(x) {
    return {
      value: x,
      map: function map(f) {
        return Identity(f(x));
      }
    };
  }
Returns the result of applying the onFailure function to the value inside
a failed promise. This is useful for handling rejected promises
inside function compositions.

@func
@memberOf R
@since v0.26.0
@category Function
@sig (e -> b) -> (Promise e a) -> (Promise e b)
@sig (e -> (Promise f b)) -> (Promise e a) -> (Promise f b)
@param {Function} onFailure The function to apply. Can return a value or a promise of a value.
@param {Promise} p
@return {Promise} The result of calling `p.then(null, onFailure)`
@see R.andThen
@example

     const failedFetch = id => Promise.reject('bad ID');
     const useDefault = () => ({ firstName: 'Bob', lastName: 'Loblaw' });

     //recoverFromFailure :: String -> Promise ({ firstName, lastName })
     const recoverFromFailure = R.pipe(
       failedFetch,
       R.otherwise(useDefault),
       R.andThen(R.pick(['firstName', 'lastName'])),
     );
     recoverFromFailure(12345).then(console.log);