public static void updateArtwork(MovieSet movieSet){
  findArtworkInArtworkFolder(movieSet);
  for (  Movie movie : new ArrayList<>(movieSet.getMovies())) {
    findArtworkInMovieFolder(movieSet,movie);
  }
}

public static void updateArtwork ( MovieSet movieSet ) { findArtworkInArtworkFolder ( movieSet ) ; for ( Movie movie : new ArrayList < > ( movieSet . getMovies ( ) ) ) { findArtworkInMovieFolder ( movieSet , movie ) ; } }
update the artwork for a given movie set . this should be triggered after every movie set change like creating , adding movies , removing movies
