/** {@inheritDoc} */
public void processOffDocumentItem(OffDocumentItem oDI) {
if (oDI instanceof BookmarkData) {
renderBookmarkTree((BookmarkData) oDI);
} else if (oDI instanceof OffDocumentExtensionAttachment) {
ExtensionAttachment attachment = ((OffDocumentExtensionAttachment)oDI).getAttachment();
if (extensionAttachments == null) {
extensionAttachments = new java.util.ArrayList();
}
extensionAttachments.add(attachment);
} else {