public void testNulls() {
    ServiceManager manager = new ServiceManager(Arrays.asList());
    new NullPointerTester()
        .setDefault(ServiceManager.Listener.class, new RecordingListener())
        .testAllPublicInstanceMethods(manager);
  }

  private static final class RecordingListener extends ServiceManager.Listener {
    volatile boolean healthyCalled;
    volatile boolean stoppedCalled;

  }

  /**
   * Runs {@link #testMethod} on every public instance method of the class of {@code instance},
   * including those inherited from superclasses of the same package.
   */
  public void testAllPublicInstanceMethods(Object instance) {
    testInstanceMethods(instance, Visibility.PUBLIC);
  }

  /**
   * Verifies that {@code method} produces a {@link NullPointerException} or {@link

  private static class Nested {}


  public void testNulls() throws IOException {
    new NullPointerTester().testAllPublicStaticMethods(ClassPath.class);
    new NullPointerTester()
        .testAllPublicInstanceMethods(ClassPath.from(getClass().getClassLoader()));
  }

  @AndroidIncompatible // ClassPath is documented as not supporting Android

  public void testLocationsFrom_idempotentScan() throws IOException {

  }

  /**
   * Runs {@link #testMethod} on every public instance method of the class of {@code instance},
   * including those inherited from superclasses of the same package.
   */
  public void testAllPublicInstanceMethods(Object instance) {
    testInstanceMethods(instance, Visibility.PUBLIC);
  }

  /**
   * Verifies that {@code method} produces a {@link NullPointerException} or {@link

    NullPointerTester tester = new NullPointerTester();

    tester.testAllPublicStaticMethods(Range.class);
    tester.testAllPublicStaticMethods(Range.class);

    tester.testAllPublicInstanceMethods(Range.all());
    tester.testAllPublicInstanceMethods(Range.open(1, 3));
  }

    NullPointerTester npTester = new NullPointerTester();
    npTester.testAllPublicConstructors(Optional.class);
    npTester.testAllPublicStaticMethods(Optional.class);
    npTester.testAllPublicInstanceMethods(Optional.absent());
    npTester.testAllPublicInstanceMethods(Optional.of("training"));
  }

    tester.ignore(Equivalence.class.getMethod("wrap", Object.class));

    tester.testAllPublicStaticMethods(Equivalence.class);
    tester.testAllPublicInstanceMethods(Equivalence.equals());
    tester.testAllPublicInstanceMethods(Equivalence.identity());
  }

@NullUnmarked
public class MapMakerTest extends TestCase {
  @GwtIncompatible // NullPointerTester
  public void testNullParameters() throws Exception {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicInstanceMethods(new MapMaker());
  }

  @GwtIncompatible // threads
  static final class DelayingIdentityLoader<T> implements Function<T, T> {
    private final CountDownLatch delayLatch;

    tester.testAllPublicStaticMethods(ImmutableSortedMap.class);
    tester.testAllPublicInstanceMethods(ImmutableSortedMap.<String, Integer>naturalOrder());
    tester.testAllPublicInstanceMethods(ImmutableSortedMap.of());
    tester.testAllPublicInstanceMethods(ImmutableSortedMap.of("one", 1));
    tester.testAllPublicInstanceMethods(ImmutableSortedMap.of("one", 1, "two", 2, "three", 3));
  }

    tester.testAllPublicStaticMethods(ImmutableMultimap.class);
    tester.ignore(ImmutableListMultimap.class.getMethod("get", Object.class));
    tester.testAllPublicInstanceMethods(ImmutableMultimap.of());
    tester.testAllPublicInstanceMethods(ImmutableMultimap.of("a", 1));
  }