The generated script field is not visible in the inspector

In the Tank demo, after creating a public reference to generated
TanksInputActions script in the TankShooting class like so:

public class TankShooting : MonoBehaviour
{
    ...
    public TanksInputActions actions;
    ...
}

the field doesn’t become visible in the inspector:

Bases on a few videos I watched, it should be working.

Unity: 2019.3.0b4
Input System: preview - 1.0.0

In the current version controls object should be created via a constructor and should be working without assigning in the editor: New Input system not serialized