# File lib/rbrainz/webservice/includes.rb, line 147
      def initialize(includes)
        Utils.check_options includes, 
            :artist, :counts, :release_groups, :release_events, :discs, :tracks,
            :labels, :isrcs, :artist_rels, :release_rels, :track_rels,
            :label_rels, :url_rels, :track_level_rels, :tags, :user_tags,
            :ratings, :user_ratings
        @parameters = Array.new
        @parameters << 'artist'       if includes[:artist]
        @parameters << 'counts'       if includes[:counts]
        @parameters << 'release-groups' if includes[:release_groups]
        @parameters << 'release-events' if includes[:release_events]
        @parameters << 'discs'        if includes[:discs]
        @parameters << 'tracks'       if includes[:tracks]
        @parameters << 'labels'       if includes[:labels]
        @parameters << 'isrcs'        if includes[:isrcs]
        @parameters << 'artist-rels'  if includes[:artist_rels]
        @parameters << 'release-rels' if includes[:release_rels]
        @parameters << 'track-rels'   if includes[:track_rels]
        @parameters << 'label-rels'   if includes[:label_rels]
        @parameters << 'url-rels'     if includes[:url_rels]
        @parameters << 'track-level-rels' if includes[:track_level_rels]
        @parameters << 'tags'         if includes[:tags]
        @parameters << 'user-tags'    if includes[:user_tags]
        @parameters << 'ratings'      if includes[:ratings]
        @parameters << 'user-ratings' if includes[:user_ratings]
      end