code: function cloneDeepWith(value, customizer) {
        customizer = typeof customizer == 'function' ? customizer : undefined;
        return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
      }
docs: This method is like `_.cloneWith` except that it recursively clones `value`.
  
  @static
  @memberOf _
  @since 4.0.0
  @category Lang
  @param {*} value The value to recursively clone.
  @param {Function} [customizer] The function to customize cloning.
  @returns {*} Returns the deep cloned value.
  @see _.cloneWith
  @example
  
  function customizer(value) {
  if (_.isElement(value)) {
  return value.cloneNode(true);
  }
  }
  
  var el = _.cloneDeepWith(document.body, customizer);
  
  console.log(el === document.body);
  // => false
  console.log(el.nodeName);
  // => 'BODY'
  console.log(el.childNodes.length);
  // => 20