internal static void CustomImporterUndo <T, U>(CustomImporterSettingsBase <T, U> importer, string text) where T : CustomImporterClass <U>, new()
 {
     if (importer != null)
     {
         Undo.RecordObject(importer, string.Format(text, importer.ImporterName));
     }
 }
 public CustomImporterSettingBaseEditorItem(CustomImporterSettingsBase <T, U> data) : base(data)
 {
 }