} else if (contentType.equals(ContentTypes.PRESENTATIONML_NOTES_SLIDE)) {
return new NotesSlidePart(new PartName(partName));
} else if (contentType.equals(ContentTypes.PRESENTATIONML_COMMENT_AUTHORS)) {
return new CommentAuthorsPart(new PartName(partName));
} else {
throw new PartUnrecognisedException("No subclass found for "
+ partName + " (content type '" + contentType + "')");
}
}