      - parameter object: 将要存入的 object
      - parameter key:    将要存入的 key
      */
-    @available(*, deprecated, message: "Extensions directly on UserDefaults are deprecated. Use `UserDefaults.rat.save` instead.", renamed: "rat.save")
+    @available(*, deprecated, message: "Extensions directly on UserDefaults are deprecated. Use `UserDefaults.standard.rat.save` instead.", renamed: "rat.save(_:for:)")
     public func rat_save(_ object: Any?, forKey key: String) {
         self.set(object, forKey: key)
         self.synchronize()

    /// - Parameters:
    ///   - value: 将要存入的 Int 值
    ///   - key: 将要存入的 key
    public func saveInt(_ value: Int, forKey key: String) {
        base.set(value, forKey: key)
        base.synchronize()

    /// - Parameters:
    ///   - value: 将要存入的 Double 值
    ///   - key: 将要存入的 key
    @available(*, deprecated, message: "Extensions directly on UserDefaults are deprecated. Use `UserDefaults.standard.rat.save` instead.", renamed: "save(_:for:)")
    public func saveDouble(_ value: Double, forKey key: String) {
        base.set(value, forKey: key)
        base.synchronize()
