public void MapFromExistingClasses(P1Class p1, P2Class p2, P1P4Model model)
        {
            model.MapFrom(p1, p2);

            Assert.True(p1.P1 == model.P1);
            Assert.True(p2.P2 == model.P2);
        }
 public void MapFromExistingClass(P1Class p1, P1P4Model model)
 {
     model.MapFrom(p1);
     Assert.True(p1.P1 == model.P1);
 }