@Override
    public ListenableScheduledFuture<?> scheduleAtFixedRate(
        Runnable command, long initialDelay, long period, TimeUnit unit) {
      NeverSuccessfulListenableFutureTask task = new NeverSuccessfulListenableFutureTask(command);
      ScheduledFuture<?> scheduled = delegate.scheduleAtFixedRate(task, initialDelay, period, unit);
      return new ListenableScheduledTask<@Nullable Void>(task, scheduled);
    }

    @Override

   * cannot be found (it is only to be found in fairly recent JDKs). Tries to test method {@link
   * sun.misc.JavaLangAccess#getStackTraceDepth(Throwable) getStackTraceDepth} prior to return it
   * (might fail some JDKs).
   *
   * <p>See <a href="https://github.com/google/guava/issues/2887">Throwables#lazyStackTrace throws
   * UnsupportedOperationException</a>.
   */
  @J2ktIncompatible

   * cannot be found (it is only to be found in fairly recent JDKs). Tries to test method {@link
   * sun.misc.JavaLangAccess#getStackTraceDepth(Throwable) getStackTraceDepth} prior to return it
   * (might fail some JDKs).
   *
   * <p>See <a href="https://github.com/google/guava/issues/2887">Throwables#lazyStackTrace throws
   * UnsupportedOperationException</a>.
   */
  @J2ktIncompatible

              <compilerArgs combine.children="append">
                <!-- https://errorprone.info/docs/installation#maven -->
                <!-- TODO(cpovirk): Enable NullArgumentForNonNullParameter for
                     prod code. It's disabled automatically for "test code"
                     (which is good: our tests have intentional violations), but
                     Error Prone doesn't know it's building test code unless we

           * -4294967296L = -9223372036854775808L!
           *
           * To be clear, this bug affects not the test's computation of the expected result but the
           * _actual prod code_. But it probably affects only unusual cases.
           */
          continue;
        }
        BigInteger expectedResult = valueOf(a).multiply(valueOf(b));

   * b)} is true if and only if {@code equivalence.equivalent(function.apply(a), function.apply(b))}
   * is true.
   *
   * <p>For example:
   *
   * <pre>{@code
   * Equivalence<Person> SAME_AGE = Equivalence.equals().onResultOf(GET_PERSON_AGE);
   * }</pre>
   *
   * <p>{@code function} will never be invoked with a null value.
   *
   * <p>Note that {@code function} must be consistent according to {@code this} equivalence

   * b)} is true if and only if {@code equivalence.equivalent(function.apply(a), function.apply(b))}
   * is true.
   *
   * <p>For example:
   *
   * <pre>{@code
   * Equivalence<Person> SAME_AGE = Equivalence.equals().onResultOf(GET_PERSON_AGE);
   * }</pre>
   *
   * <p>{@code function} will never be invoked with a null value.
   *
   * <p>Note that {@code function} must be consistent according to {@code this} equivalence