public static SoccerMatchModel build() {
Set<PlayerModel> players = new HashSet<PlayerModel>();
UUID matchId = UUID.randomUUID();
players.add(new PlayerModel(UUID.randomUUID(), "piet", PlayerState.playing));
players.add(new PlayerModel(UUID.randomUUID(), "klaas", PlayerState.playing));
players.add(new PlayerModel(UUID.randomUUID(), "frank", PlayerState.playing));
players.add(new PlayerModel(UUID.randomUUID(), "henk", PlayerState.playing));
Match match = new Match(matchId, players);
return new SoccerMatchModel(players, match);
}