define(['../internal/createDefaults', './merge', '../internal/mergeDefaults'], function(createDefaults, merge, mergeDefaults) {

  /**
   * This method is like `_.defaults` except that it recursively assigns
   * default properties.
   *
   * **Note:** This method mutates `object`.
   *
   * @static
   * @memberOf _
   * @category Object
   * @param {Object} object The destination object.
   * @param {...Object} [sources] The source objects.
   * @returns {Object} Returns `object`.
   * @example
   *
   * _.defaultsDeep({ 'user': { 'name': 'barney' } }, { 'user': { 'name': 'fred', 'age': 36 } });
   * // => { 'user': { 'name': 'barney', 'age': 36 } }
   *
   */
  var defaultsDeep = createDefaults(merge, mergeDefaults);

  return defaultsDeep;
});