1  var apply = require('./_apply'),
 2      baseRest = require('./_baseRest'),
 3      customDefaultsMerge = require('./_customDefaultsMerge'),
 4      mergeWith = require('./mergeWith');
 5  
 6  /**
 7   * This method is like `_.defaults` except that it recursively assigns
 8   * default properties.
 9   *
10   * **Note:** This method mutates `object`.
11   *
12   * @static
13   * @memberOf _
14   * @since 3.10.0
15   * @category Object
16   * @param {Object} object The destination object.
17   * @param {...Object} [sources] The source objects.
18   * @returns {Object} Returns `object`.
19   * @see _.defaults
20   * @example
21   *
22   * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
23   * // => { 'a': { 'b': 2, 'c': 3 } }
24   */
25  var defaultsDeep = baseRest(function(args) {
26    args.push(undefined, customDefaultsMerge);
27    return apply(mergeWith, undefined, args);
28  });
29  
30  module.exports = defaultsDeep;