\helpref{wxDataObjectSimple}{wxdataobjectsimple} is
the simplest wxDataObject possible and only holds data in a single format (such
as HTML or text) and \helpref{wxDataObjectComposite}{wxdataobjectcomposite} is
-the simplest way to implement a wxDataObject which that does support multiple formats
+the simplest way to implement a wxDataObject that does support multiple formats
because it achieves this by simply holding several wxDataObjectSimple objects.
So, you have several solutions when you need a wxDataObject class (and you need