Function cloneDeep

lib/web/jshint.js:9854–9857

* Creates a deep clone of `value`. If `customizer` is provided it is invoked * to produce the cloned values. If `customizer` returns `undefined` cloning * is handled by the method instead. The `customizer` is bound to `thisArg` * and invoked with two argument; (value [, index|key, obj

(value, customizer, thisArg)

     * // => 20
     */
    function cloneDeep(value, customizer, thisArg) {
      customizer = typeof customizer == 'function' && bindCallback(customizer, thisArg, 1);
      return baseClone(value, true, customizer);
    }

    /**
     * Checks if `value` is classified as an `arguments` object.