OptionalexpectedExpected content version for optimistic concurrency control. When mismatched, mutations are aborted with STALE_TARGET (details.current carries current version). Omitted, no check is made.
OptionalindexRow to focus; omitted or negative, the playlist loses its focus.
OptionalplaylistIndex of the playlist; omitted, the active playlist. An index past the last playlist fails with INVALID_INDEX; with this omitted and no active playlist the call fails with NO_ACTIVE_ITEM.
OptionalplaylistPersistent unique identifier of a playlist (bracketed GUID, case-insensitive), used in place of a mutable index. Mutually exclusive with playlist; passing both or an invalid format fails with INVALID_PARAMS. Fails with NOT_FOUND if the playlist does not exist, never falling back. Invalid-format and not-found failures return the given GUID in details.playlistGuid.
Parameters for
playlist.setFocusedTrack. Move the focus of a playlist to a row, or remove it. A row past the last one fails withINVALID_INDEX.