FunctionaObject2.cs

public partial FunctionaObject2 where T: class, ICloneable, new()
{
   public static Func<FunctionalObject<T>, P> NewGetLens<P>(Func<T, P> func)
        {
            return (o => func.Invoke(o.GetValue()));
        }
        
  public static Func<FunctionalObject<T>, FunctionalObject<T>> NewSetLens(Action<T> func)
        {
            return o => o.With(func);
        }
}