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define(['./_apply', './_baseRest', './_customDefaultsMerge', './mergeWith'], function(apply, baseRest, customDefaultsMerge, mergeWith) {
  /** Used as a safe reference for `undefined` in pre-ES5 environments. */  var undefined;
  /**   * This method is like `_.defaults` except that it recursively assigns   * default properties.   *   * **Note:** This method mutates `object`.   *   * @static   * @memberOf _   * @since 3.10.0   * @category Object   * @param {Object} object The destination object.   * @param {...Object} [sources] The source objects.   * @returns {Object} Returns `object`.   * @see _.defaults   * @example   *   * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });   * // => { 'a': { 'b': 2, 'c': 3 } }   */  var defaultsDeep = baseRest(function(args) {    args.push(undefined, customDefaultsMerge);    return apply(mergeWith, undefined, args);  });
  return defaultsDeep;});