code: function mapValues(object, iteratee) {
        var result = {};
        iteratee = getIteratee(iteratee, 3);
  
        baseForOwn(object, function(value, key, object) {
          baseAssignValue(result, key, iteratee(value, key, object));
        });
        return result;
      }
docs: Creates an object with the same keys as `object` and values generated
  by running each own enumerable string keyed property of `object` thru
  `iteratee`. The iteratee is invoked with three arguments:
  (value, key, object).
  
  @static
  @memberOf _
  @since 2.4.0
  @category Object
  @param {Object} object The object to iterate over.
  @param {Function} [iteratee=_.identity] The function invoked per iteration.
  @returns {Object} Returns the new mapped object.
  @see _.mapKeys
  @example
  
  var users = {
  'fred':    { 'user': 'fred',    'age': 40 },
  'pebbles': { 'user': 'pebbles', 'age': 1 }
  };
  
  _.mapValues(users, function(o) { return o.age; });
  // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
  
  // The `_.property` iteratee shorthand.
  _.mapValues(users, 'age');
  // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)