HotChocolate GraphQL中的类型继承

public interface IProduct
{
    string Id { get; }
    string Name { get; }
}

public class Book : IProduct
{
    public string Id { get; set; }
    public string Name { get; set; }
    public string Author { get; set; }
}

public class Movie : IProduct
{
    public string Id { get; set; }
    public string Name { get; set; }
    public string Director { get; set; }
}

public class ProductType : InterfaceType<IProduct>
{
    protected override void Configure(IInterfaceTypeDescriptor<IProduct> descriptor)
    {
        descriptor.Name("Product");
        descriptor.Field(p => p.Id).Type<NonNullType<StringType>>();
        descriptor.Field(p => p.Name).Type<NonNullType<StringType>>();
    }
}

public class BookType : ObjectType<Book>
{
    protected override void Configure(IObjectTypeDescriptor<Book> descriptor)
    {
        descriptor.Name("Book");
        descriptor.Implements<ProductType>();
        descriptor.Field(b => b.Author).Type<NonNullType<StringType>>();
    }
}

public class MovieType : ObjectType<Movie>
{
    protected override void Configure(IObjectTypeDescriptor<Movie> descriptor)
    {
        descriptor.Name("Movie");
        descriptor.Implements<ProductType>();
        descriptor.Field(m => m.Director).Type<NonNullType<StringType>>();
    }
}