### Question:
StorageContainerStoreBuilder { public StorageContainerStore build() { checkNotNull(scmFactory, "StorageContainerManagerFactory is not provided"); checkNotNull(storeConf, "StorageConfiguration is not provided"); checkNotNull(mvccStoreFactory, "MVCCStoreFactory is not provided"); checkNotNull(defaultBackendUri, "Default backend uri is not provided"); checkNotNull(placementPolicyFactory, "Storage Container Placement Policy Factory is not provided"); checkNotNull(clientManagerSupplier, "Storage server client manager is not provided"); RangeStoreServiceFactoryImpl serviceFactory = new RangeStoreServiceFactoryImpl( storeConf, placementPolicyFactory.newPlacementPolicy(), storeResources.scheduler(), mvccStoreFactory, clientManagerSupplier.get()); RangeStoreContainerServiceFactoryImpl containerServiceFactory = new RangeStoreContainerServiceFactoryImpl(serviceFactory); return new StorageContainerStoreImpl( storeConf, scmFactory, containerServiceFactory, clientManagerSupplier.get(), statsLogger); } private  StorageContainerStoreBuilder(); static StorageContainerStoreBuilder newBuilder(); StorageContainerStoreBuilder withStorageContainerPlacementPolicyFactory(
        StorageContainerPlacementPolicy.Factory placementPolicyFactory); StorageContainerStoreBuilder withStatsLogger(StatsLogger statsLogger); StorageContainerStoreBuilder withStorageConfiguration(StorageConfiguration storeConf); StorageContainerStoreBuilder withStorageContainerManagerFactory(StorageContainerManagerFactory scmFactory); StorageContainerStoreBuilder withStorageResources(StorageResources resources); StorageContainerStoreBuilder withRangeStoreFactory(MVCCStoreFactory storeFactory); StorageContainerStoreBuilder withDefaultBackendUri(URI uri); StorageContainerStoreBuilder withStorageServerClientManager(
        Supplier<StorageServerClientManager> clientManagerSupplier); StorageContainerStore build();  }### Answer:
@Test public void testBuild() { StorageContainerStore storageContainerStore = StorageContainerStoreBuilder.newBuilder() .withStorageConfiguration(mock(StorageConfiguration.class)) .withStorageContainerManagerFactory(mock(StorageContainerManagerFactory.class)) .withStorageResources(StorageResources.create()) .withRangeStoreFactory(storeFactory) .withStorageServerClientManager(() -> mock(StorageServerClientManager.class)) .withDefaultBackendUri(uri) .build(); assertTrue(storageContainerStore instanceof StorageContainerStoreImpl); }