Set UMG ViewModel for UUserWidget C++

I try to implement new MVVM system into my project, but have a problem. In documentation for Manual ViewModel Creation Type says, that:

The Manual creation method requires you to create an instance of the Viewmodel yourself somewhere in your application’s code, then assign it to the widget manually. The widget has a Viewmodel object reference, but it will have a null value until you assign a Viewmodel to it.

As i understand, i can set Viemodel into my .cpp file of my UUserWidget class or in Blueprint, but i didnt find any functions for this in c++, is it possible? Thanks!