+ public Track artists(List<Artist> artists) {
+ value("artists", List.class).set(artists);
+ return this;
+ }
+
+ public Set<Style> styles() {
+ return value("styles", Set.class).get();
+ }
+
+ public Track styles(Set<? extends Style> styles) {
+ value("styles", Set.class).set(styles);
+ return this;
+ }