ReactiveSwift：如何重新绑定（删除旧绑定，添加新的）？

I have a view that has to be able to rebind to a new view-model periodically: that means removing the old bindings as well as hooking up the new ones. I have a working solution, but it's not thread-safe and I wonder if there's a more idiomatic way to do the same:I have a view that has to be able to rebind to