The objects of this class are never created by the application code but are
returned by \helpref{wxMimeTypesManager::GetFileTypeFromMimeType}{wxmimetypesmanagergetfiletypefrommimetype} and
\helpref{wxMimeTypesManager::GetFileTypeFromExtension}{wxmimetypesmanagergetfiletypefromextension} methods.
-But it's your responsibility to delete the returned pointer when you're done
+But it is your responsibility to delete the returned pointer when you're done
with it!
% TODO describe MIME types better than this...