+ elmo-msgdb-directory)))
+
+(luna-define-method elmo-folder-newsgroups ((folder elmo-multi-folder))
+ (delq nil
+ (elmo-flatten
+ (mapcar
+ 'elmo-folder-newsgroups
+ (elmo-flatten
+ (mapcar
+ 'elmo-folder-get-primitive-list
+ (elmo-multi-folder-children-internal folder)))))))