``` public interface IDocumentSavingCallb ``` Implement this interface if you want to have your own custom method called during saving a document. **Examples:** Shows how to manage a document while......are supported: Docx, FlatOpc, Docm, Dotm, Dotx. OoxmlSaveOptions...DOCX, "docx"}, {SaveFormat.DOCM, "docm"}, {SaveFormat.DOTM, "dotm"}...