@Override
    public Collection<? extends Backend> get() {
        ClassLoader classLoader = classLoaderSupplier.get();
        return get(ServiceLoader.load(BackendProviderService.class, classLoader));
    }
@Test
    void should_create_a_backend() {
        BackendSupplier backendSupplier = new BackendServiceLoader(classLoaderSupplier, objectFactory);
        assertThat(backendSupplier.get().iterator().next(), is(notNullValue()));
    }