(nsHashtableEnumFunc) Destroy_LeafNode, 0 )
(nsHashtableEnumFunc) 0, 0 )
      CategoryNode()          : nsObjectHashtable((nsHashtableCloneElementFunc) 0, 0,                                (nsHashtableEnumFunc) Destroy_LeafNode, 0 )        {          // Nothing else to do here...        }