try {
      new NullPointerTester().testInstanceMethods(instance, visibility);
    } catch (AssertionFailedError expected) {
      return;
    }
    fail("Should detect problem in " + instance.getClass().getSimpleName());
  }

  private static void shouldFail(Object instance) {
    shouldFail(instance, Visibility.PACKAGE);
    shouldFail(instance, Visibility.PROTECTED);
    shouldFail(instance, Visibility.PUBLIC);
  }

    Field helperField = abstractFutureClass.getDeclaredField("ATOMIC_HELPER");
    helperField.setAccessible(true);
    assertEquals(expectedHelperClassName, helperField.get(null).getClass().getSimpleName());
  }

  private static ClassLoader getClassLoader(final Set<String> disallowedClassNames) {
    final String concurrentPackage = SettableFuture.class.getPackage().getName();

        .setDefault(URL.class, classfile(ResourcesTest.class))
        .testAllPublicStaticMethods(Resources.class);
  }

  private static URL classfile(Class<?> c) {
    return c.getResource(c.getSimpleName() + ".class");
  }

      this.exceptionClass = exceptionClass;
    }

    @Override
    public final void run() {
      try {
        realRun();
        threadShouldThrow(exceptionClass.getSimpleName());
      } catch (Throwable t) {
        if (!exceptionClass.isInstance(t)) threadUnexpectedException(t);
      }
    }
  }

  public abstract class ThreadShouldThrow extends Thread {

      }
      assertEquals("Failed to forward to " + method, 1, called.get());
    }

    @Override
    public String toString() {
      return "dummy " + interfaceType.getSimpleName();
    }
  }

      }
      assertEquals("Failed to forward to " + method, 1, called.get());
    }

    @Override
    public String toString() {
      return "dummy " + interfaceType.getSimpleName();
    }
  }

      Object featureAsObject = feature; // to work around bogus JDK warning
      if (featureAsObject instanceof Enum) {
        Enum<?> f = (Enum<?>) featureAsObject;
        temp.add(f.getDeclaringClass().getSimpleName() + "." + feature);
      } else {
        temp.add(feature.toString());
      }
    }
    return temp.toString();
  }

    void assertPermitted(Exception exception) {
      if (!isPermitted(exception)) {
        String message =
            "Exception "
                + exception.getClass().getSimpleName()
                + " was thrown; expected "
                + getMessage();
        Helpers.fail(exception, message);
      }
    }

    private static final long serialVersionUID = 0;
  }

      this.exceptionClass = exceptionClass;
    }

    public final void run() {
      try {
        realRun();
        threadShouldThrow(exceptionClass.getSimpleName());
      } catch (Throwable t) {
        if (!exceptionClass.isInstance(t)) threadUnexpectedException(t);
      }
    }
  }

  public abstract class ThreadShouldThrow extends Thread {

     *
     * <p>Behaves similarly to {@link Class#getSimpleName()} but does not require the class to be
     * loaded.
     *
     * <p>But note that this class uses heuristics to identify the simple name. See a related
     * discussion in <a href="https://github.com/google/guava/issues/3349">issue 3349</a>.
     */
    public String getSimpleName() {
      int lastDollarSign = className.lastIndexOf('$');