@Override
    public List<Decorator> findForStream(String streamId) {
        return toInterfaceList(coll.find(DBQuery.is(DecoratorImpl.FIELD_STREAM, Optional.of(streamId))).toArray());
    }
@Test
    @MongoDBFixtures("DecoratorServiceImplTest.json")
    public void findForStreamReturnsDecoratorsForStream() {
        assertThat(decoratorService.findForStream("000000000000000000000001"))
                .hasSize(2)
                .extracting(Decorator::id)
                .containsExactly("588bcafebabedeadbeef0001", "588bcafebabedeadbeef0002");
        assertThat(decoratorService.findForStream("000000000000000000000002")).isEmpty();
    }