party.with(new Friend("Robert"));
collection.save(party);
Friend friend = collection.findOne("{friends.name:'Peter'}").projection("{friends.$:1}").map(new ResultHandler<Friend>() {
public Friend map(DBObject dbo) {
Party result = unmarshaller.unmarshall((BsonDocument) dbo, Party.class);
return result.friends.get(0);
}
});
assertThat(friend.getName()).isEqualTo("Peter");