Fragment instances create/update

[zombie6888]

In my schema i have many nested objects with the same data set. One of the key feature for me is fragment. I use fragment objects for different screens/states. However, sometimes i need to create new instance or update just one or few fields of my state objects. With request data nested classes i can create new instance with desired fields or create copy by using builder and rebuild methods. But it doesn't work for fragment generated classes. Is there a way to achieve same behavior with fragments?