def initialize(includes)
Utils.check_options includes,
:artist, :releases, :puids, :isrcs, :artist_rels, :release_rels,
:track_rels, :label_rels, :url_rels, :tags, :user_tags, :ratings,
:user_ratings
@parameters = Array.new
@parameters << 'artist' if includes[:artist]
@parameters << 'releases' if includes[:releases]
@parameters << 'puids' if includes[:puids]
@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 << 'tags' if includes[:tags]
@parameters << 'user-tags' if includes[:user_tags]
@parameters << 'ratings' if includes[:ratings]
@parameters << 'user-ratings' if includes[:user_ratings]
end