def readdir(self):
children = dict()
for obj in self.objs:
for name, obj in scan(obj):
if not hasValidStatus(obj):
continue
children.setdefault(name, []).append(obj)
for name, objs in children.iteritems():
inode = map_objects(objs)
if inode:
yield name, inode
def is_available(self):
return hasValidStatus(self.objs)
