136     public MediaMetadata getMusic(String musicId) {  in getMusic()  argument
137         return mMusicListById.containsKey(musicId) ? mMusicListById.get(musicId).metadata : null;  in getMusic()
140     public synchronized void updateMusic(String musicId, MediaMetadata metadata) {  in updateMusic()  argument
141         MutableMediaMetadata track = mMusicListById.get(musicId);  in updateMusic()
157     public void setFavorite(String musicId, boolean favorite) {  in setFavorite()  argument
159             mFavoriteTracks.add(musicId);  in setFavorite()
161             mFavoriteTracks.remove(musicId);  in setFavorite()
165     public boolean isFavorite(String musicId) {  in isFavorite()  argument
166         return mFavoriteTracks.contains(musicId);  in isFavorite()
232                         String musicId = item.getString(MediaMetadata.METADATA_KEY_MEDIA_ID);  in retrieveMedia()  local
233                         mMusicListById.put(musicId, new MutableMediaMetadata(musicId, item));  in retrieveMedia()