oneSizeSuite.addTest(derivedSuite);
      }
    }
    return suite;
  }

  protected List<TestSuite> createDerivedSuites(
      FeatureSpecificTestSuiteBuilder<?, ? extends OneSizeTestContainerGenerator<T, E>>
          parentBuilder) {
    return new ArrayList<>();
  }

  /** Builds a test suite for one particular {@link CollectionSize}. */
  private static final class OneSizeTestSuiteBuilder<T, E>

@ElementTypesAreNonnullByDefault
public abstract class AbstractContainerTester<C, E extends @Nullable Object>
    extends AbstractTester<OneSizeTestContainerGenerator<C, E>> {
  protected SampleElements<E> samples;
  protected C container;

  @Override
  @OverridingMethodsMustInvokeSuper
  public void setUp() throws Exception {
    super.setUp();