cant find Deleted Inserted

       using (WordprocessingDocument doc = WordprocessingDocument.Open("testd.docx", true))
        {
            var body = doc.MainDocumentPart.Document.Body;
            List<OpenXmlElement> changes =
           body.Descendants<ParagraphPropertiesChange>()
           //.Where(c => c.Author.Value == authorName)
           .Cast<OpenXmlElement>().ToList();   // number is 0

            List<OpenXmlElement> deletions =
            body.Descendants<Deleted>()
            //.Where(c => c.Author.Value == authorName)
            .Cast<OpenXmlElement>().ToList();   // number is 0

            var insertions =
           body.Descendants<Inserted>()
           //.Where(c => c.Author.Value == authorName)
           .Cast<OpenXmlElement>().ToList();  // number is 0

        }

testd.docx

Start with the supplied testd.docx and the body.Descendants(), Descendants(), and Descendants() queries shown in the issue. Reproduce the empty results and inspect the document structure to determine what documentation or example needs correction; done when the expected elements can be found and the usage is documented.