j8swtch_example2.java

public List<Pair<Character,MediaItem>> convert(List<Character> characters) {
	List<Pair<Character,MediaItem>> downloads = new ArrayList<>();
    for (Character character : characters) {
    	if (character.getItems() == null) {
        	continue;
        }
        
        for (MediaItem item : character.getItems()) {
        	downloads.add(new Pair<>(character, item));
        }
    }

    return downloads;
}