Comment 2 for bug 1495482

And it appears that if I instantiate the models at the same level, without nesting them, this works:

  CustomListModel { id: customListModel }
  CustomSortFilterModel { id: customSortFilterModel }
  SortFilterModel {
    sort.property: "blah"
    sort.order: Qt.DescendingOrder
    model: customSortFilterModel
  }