int (*playlist_NodeGroup_inner) (playlist_t *, playlist_item_t *,playlist_item_t **,int, int, int);
int (*playlist_NodeSort_inner) (playlist_t *, playlist_item_t *,int, int);
int (*playlist_RecursiveNodeSort_inner) (playlist_t *, playlist_item_t *,int, int);
int (*playlist_NodeGroup_inner) (playlist_t *, playlist_item_t *,playlist_item_t **,int, int, int);
int (*playlist_NodeSort_inner) (playlist_t *, playlist_item_t *,int, int);
int (*playlist_RecursiveNodeSort_inner) (playlist_t *, playlist_item_t *,int, int);