* 将目标对象中和源对象值不同的数据作为键值对返回 * @param {object} target 目标对象 * @param {object} source 源对象 * @param {Array. } skipProps 要忽略比较的属性数组 * @param {string} skipPrefix 要忽略的属性前缀
(target, source, skipProps, skipPrefix)
source not stored for this graph (policy: none)