private static class VisibilityMethods {

    @SuppressWarnings("unused") // Called by reflection
    private void privateMethod() {}

    @SuppressWarnings("unused") // Called by reflection
    void packagePrivateMethod() {}

    @SuppressWarnings("unused") // Called by reflection
    protected void protectedMethod() {}

    @SuppressWarnings("unused") // Called by reflection
    public void publicMethod() {}
  }

    // ignored by testEquals()
    GoodEquals(@SuppressWarnings("unused") NotInstantiable x) {
      this.a = "x";
      this.b = -1;
    }

    // will keep trying
    public GoodEquals(@SuppressWarnings("unused") NotInstantiable x, int b) {
      this.a = "x";
      this.b = b;
    }

    // keep trying
    @SuppressWarnings("unused")
    static GoodEquals create(int a, int b) {

   *
   * How this works is best explained with an example:
   *
   * For a RateLimiter that produces 1 token per second, every second that goes by with the
   * RateLimiter being unused, we increase storedPermits by 1. Say we leave the RateLimiter unused
   * for 10 seconds (i.e., we expected a request at time X, but we are at time X + 10 seconds before
   * a request actually arrives; this is also related to the point made in the last paragraph), thus

      @SuppressWarnings("unused") // https://errorprone.info/bugpattern/FutureReturnValueIgnored
      Future<?> possiblyIgnoredError = threadPool.submit(new Producer(q, 20));
      @SuppressWarnings("unused") // https://errorprone.info/bugpattern/FutureReturnValueIgnored
      Future<?> possiblyIgnoredError1 = threadPool.submit(new Producer(q, 20));

  }

  public void testCallableStartsAfterFirstFutureCompletes() {
    @SuppressWarnings({"unused", "nullness"})
    Future<?> possiblyIgnoredError = serializer.submitAsync(firstCallable, directExecutor());
    TestCallable secondCallable = new TestCallable(Futures.<Void>immediateFuture(null));
    @SuppressWarnings({"unused", "nullness"})
    Future<?> possiblyIgnoredError1 = serializer.submitAsync(secondCallable, directExecutor());

  }

  private abstract class WithGenericBound<A> {

    @SuppressWarnings("unused")
    public <B extends A> void withTypeVariable(List<B> list) {}

    @SuppressWarnings("unused")
    public <E extends Enum<E>> void withRecursiveBound(List<E> list) {}

    @SuppressWarnings("unused")
    public <K extends List<V>, V extends List<K>> void withMutualRecursiveBound(
        List<Map<K, V>> list) {}

  }

  private abstract class WithGenericBound<A> {

    @SuppressWarnings("unused")
    public <B extends A> void withTypeVariable(List<B> list) {}

    @SuppressWarnings("unused")
    public <E extends Enum<E>> void withRecursiveBound(List<E> list) {}

    @SuppressWarnings("unused")
    public <K extends List<V>, V extends List<K>> void withMutualRecursiveBound(
        List<Map<K, V>> list) {}

    assertEquals(TypeToken.of(String.class), invokable.getOwnerType());
  }

  private static final class FinalClass {
    @SuppressWarnings("unused") // used by reflection
    void notFinalMethod() {}
  }

  public void testNonFinalMethodInFinalClass_isOverridable() throws Exception {

    assertEquals(TypeToken.of(String.class), invokable.getOwnerType());
  }

  private static final class FinalClass {
    @SuppressWarnings("unused") // used by reflection
    void notFinalMethod() {}
  }

  public void testNonFinalMethodInFinalClass_isOverridable() throws Exception {

  }

  private static class WithWildcardType {

    @SuppressWarnings("unused")
    void withoutBound(List<?> list) {}

    @SuppressWarnings("unused")
    void withObjectBound(List<? extends Object> list) {}

    @SuppressWarnings("unused")
    void withUpperBound(List<? extends int[][]> list) {}

    @SuppressWarnings("unused")
    void withLowerBound(List<? super String[][]> list) {}