ThreadedSortCriteria is a sort criteria used in a DiscussionsMessageListFilter. It determines
whether DiscussionsMessages are returned in a flat format (based on creation date) or a
threaded format (DiscussionsMessages will appear under the DiscussionsMessages to which
they are replies).
Below are examples in XML formats. All examples are shown with all inherited members. Quoting when required is part of the examples, but you must obviously populate with your own data.