* </ul>
   */
  public void testNulls(Class<?> cls) {
    try {
      doTestNulls(cls, Visibility.PACKAGE);
    } catch (Exception e) {
      throwIfUnchecked(e);
      throw new RuntimeException(e);
    }
  }

  void doTestNulls(Class<?> cls, Visibility visibility)
      throws ParameterNotInstantiableException,
          IllegalAccessException,

   * </ul>
   */
  public void testNulls(Class<?> cls) {
    try {
      doTestNulls(cls, Visibility.PACKAGE);
    } catch (Exception e) {
      throwIfUnchecked(e);
      throw new RuntimeException(e);
    }
  }

  void doTestNulls(Class<?> cls, Visibility visibility)
      throws ParameterNotInstantiableException,
          IllegalAccessException,

  }

  public void testGoodNulls() throws Exception {
    tester.testNulls(GoodNulls.class);
  }

  public void testNoNullCheckNeededDespiteNotInstantiable() throws Exception {
    tester.doTestNulls(NoNullCheckNeededDespiteNotInstantiable.class, Visibility.PACKAGE);
  }

  public void testNulls_interface() {
    tester.testNulls(AnInterface.class);
  }

  public void testNulls_abstractClass() {