Pasted

// Menu.cs : -FirstPass
 
public abstract class Menu<T> : MonoBehaviour where T:class, Menu<T>.Item { 
// contents
    public interface Item {
        
// contents
    }
}
 
// RoundMenu.cs : -FirstPass
 
public abstract class RoundMenu : Menu<RoundMenu.Button> { 
// contents
    public abstract class Button: DragButton, RoundMenu.Item {
// contents
    }
}
 
// UnitMenu.cs : -FirstPass
 
public interface UnitMenu<out T> where T: class, Menu<T>.Item {
// contents
}
 
// TargetedActionButton.cs : Second pass
 
public abstract class TargetedActionButton : RoundMenu.Button { 
// contents 
}
 
// FloatingMenu.cs : Second pass
 
public abstract class FloatingMenu : RoundMenu {
// contents
}
 
// FloatingUnitMenu.cs : Second pass
 
public class FloatingUnitMenu : FloatingMenu, UnitMenu<FloatingUnitMenu.Button> { 
 
// redacted several methods and properties for brevity
 
    new public class Button : TargetedActionButton, Menu<FloatingUnitMenu.Button>.Item, UnitGroup.UnitButton {
 
// redacted for brevity
 
    }
}