public Optional<ContentPackInstallation> findById(ObjectId id) {
        final ContentPackInstallation installation = dbCollection.findOneById(id);
        return Optional.ofNullable(installation);
    }
@Test
    @MongoDBFixtures("ContentPackInstallationPersistenceServiceTest.json")
    public void findById() {
        final ObjectId objectId = new ObjectId("5b4c935b4b900a0000000001");
        final Optional<ContentPackInstallation> contentPacks = persistenceService.findById(objectId);

        assertThat(contentPacks)
                .isPresent()
                .get()
                .satisfies(contentPackInstallation -> assertThat(contentPackInstallation.id()).isEqualTo(objectId));
    }