public static SrmSettings ChangeDataSettings(this SrmSettings settings,
     ChangeFunc<DataSettings> change)
 {
     return settings.ChangeDataSettings(change(settings.DataSettings));
 }
 public static SrmSettings ChangeAnnotationDefs(this SrmSettings settings,
     ChangeFunc<IList<AnnotationDef>> change)
 {
     return settings.ChangeDataSettings(setD => setD.ChangeAnnotationDefs(change(setD.AnnotationDefs)));
 }