used in imperative code examples that need to iterate over a list concode_field_sep String name concode_elem_sep List<Artist> musicians concode_elem_sep List<Track> tracks concode_field_sep String getName concode_elem_sep Stream<Track> getTracks concode_elem_sep List<Artist> getMusicianList concode_elem_sep Stream<Artist> getMusicians concode_elem_sep Artist getMainMusician concode_elem_sep Album copy
List < Track > function ( ) { return unmodifiableList ( tracks ) ; }