I have an umbraco 8 code that will convert the ipublishedcontent to custom model, How to convert this approach to a umbraco 13?

here is my version 8 code:

public class KADUmbracoViewPageElement<T> : UmbracoViewPage<IPublishedElement> where T : class, new()
{
    public override void Execute()
    {
    }

    public override void InitHelpers()
    {
        base.InitHelpers();

        var mapper = DependencyResolver.Current.GetService<IUmbracoMapper>();

        ViewModel = new T();
        mapper.Map(base.Model, ViewModel);
    }

    public T ViewModel { get; set; }
}

here how to call the class and convert to custom model. @inherits KAD.Umb.Foundation.Extensions.Models.KADUmbracoViewPageElement

Can someone know how to convert this to umbraco 13?