protected override void Arrange()
        {
            base.Arrange();

            var section = new MockSectionWithMultipleChildCollections();
            BuildSection(section);
            ViewModel = SectionViewModel.CreateSection(Container, "name", section);
            
        }
 protected virtual void BuildSection(MockSectionWithMultipleChildCollections section)
 {
     section.Children.Add(new TestHandlerData() { Name = "One" });
     section.Children.Add(new TestHandlerData() { Name = "Two" });
     section.Children.Add(new TestHandlerData() { Name = "Three" });
 }