client/js/actions/PlaylistActionCreators.js
/**
    * @param {string} playlistId The unique id of the playlist object
    * @param {integer} songInex The unique id of the song object
    */
@param {string} playlistId The unique id of the playlist object
@param {integer} songInex The unique id of the song object
@param { string } playlistId The unique id of the playlist object @param { integer } songInex The unique id of the song object
addSong(playlistId, songId) {
    AppDispatcher.handleAction({
      actionType: PlaylistAction.ADD_PLAYLIST_SONG,
      playlistId: playlistId,
      songId: songId
    });
    PlaylistUtils.createPlaylistSong(playlistId, songId);
  }
addSong ( playlistId , songId ) { AppDispatcher . handleAction ( { actionType : PlaylistAction . ADD_PLAYLIST_SONG , playlistId : playlistId , songId : songId } ) ; PlaylistUtils . createPlaylistSong ( playlistId , songId ) ; }
@param {string} playlistId The unique id of the playlist object
 @param {integer} songInex The unique id of the song object
@param { string } playlistId The unique id of the playlist object @param { integer } songInex The unique id of the song object