Function cloneDeep

MathBox/mathbox-bundle.js:36932–36934

* Creates a deep clone of `value`. If a callback is provided it will be * executed to produce the cloned values. If the callback returns `undefined` * cloning will be handled by the method instead. The callback is bound to * `thisArg` and invoked with one argument; (value). *

(value, callback, thisArg)

     * // => false
     */
    function cloneDeep(value, callback, thisArg) {
      return baseClone(value, true, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));
    }

    /**
     * Creates an object that inherits from the given `prototype` object. If a