super(toCopy);
      this.hashTable = (toCopy.hashTable == null) ? null : toCopy.hashTable.clone();
      this.maxRunBeforeFallback = toCopy.maxRunBeforeFallback;
      this.expandTableThreshold = toCopy.expandTableThreshold;
      this.hashCode = toCopy.hashCode;
    }

    @Override
    SetBuilderImpl<E> add(E e) {
      checkNotNull(e);
      if (hashTable == null) {
        if (distinct == 0) {

   * was acquired, or null if no connection was acquired. The acquired connection will also be
   * given to [call] who may (for example) assign it to a [RealCall.connection].
   *
   * This confirms the returned connection is healthy before returning it. If this encounters any
   * unhealthy connections in its search, this will clean them up.
   *

    assertFalse(entries.contains(Maps.<String, @Nullable Boolean>immutableEntry("c", null)));
    assertFalse(entries.contains(Maps.<@Nullable String, Boolean>immutableEntry(null, true)));
  }

  @Override
  public void testKeySetRemoveAllNullFromEmpty() {
    try {
      super.testKeySetRemoveAllNullFromEmpty();
    } catch (RuntimeException tolerated) {

        if (profileActivation != null) {
            Activation activation = new Activation();

            activation.setActiveByDefault(profileActivation.isActiveByDefault());

            activation.setJdk(profileActivation.getJdk());

            org.apache.maven.profiles.ActivationProperty profileProp = profileActivation.getProperty();

            if (profileProp != null) {

      Preconditions.checkNotNull(runnable, "Runnable was null.");
      Preconditions.checkNotNull(executor, "Executor was null.");

      synchronized (this) {
        if (!executed) {
          RunnableExecutorPair newTail = new RunnableExecutorPair(runnable, executor);
          if (head == null) {
            head = newTail;
            tail = newTail;
          } else {

      return spliterator.tryAdvance(action);
    }

    @Override
    @Nullable GeneralSpliterator<E> trySplit() {
      Spliterator<E> split = spliterator.trySplit();
      return split == null ? null : new GeneralSpliteratorOfObject<>(split);
    }
  }

  private static final class GeneralSpliteratorOfPrimitive<
          E extends @Nullable Object, C, S extends Spliterator.OfPrimitive<E, C, S>>

      return spliterator.tryAdvance(action);
    }

    @Override
    @Nullable GeneralSpliterator<E> trySplit() {
      Spliterator<E> split = spliterator.trySplit();
      return split == null ? null : new GeneralSpliteratorOfObject<>(split);
    }
  }

  @IgnoreJRERequirement // *should* be redundant with the annotation on SpliteratorTester
  private static final class GeneralSpliteratorOfPrimitive<

        AndArtifactFilter filter1 = new AndArtifactFilter();

        AndArtifactFilter filter2 = new AndArtifactFilter(Arrays.asList(newSubFilter()));

        assertFalse(filter1.equals(null), "Expected " + filter1 + " to not equal " + null);
        assertTrue(filter1.equals(filter1), "Expected " + filter1 + " to equal " + filter1);
        assertEquals(filter1.hashCode(), filter1.hashCode());

        Objects.requireNonNull(model, "model cannot be null");

        try (Writer out = output) {
            new MavenXpp3Writer().write(out, model);
        }
    }

    @Override
    public void write(OutputStream output, Map<String, Object> options, Model model) throws IOException {
        Objects.requireNonNull(output, "output cannot be null");

        for (int i = 0; i < l; ++i) {
            Object arg = args[i];
            // if we are careful down below, a null argument goes in there
            // so we can know that the null was passed to the method
            classes[i] = arg == null ? null : arg.getClass();
        }

        return getMostSpecific(methodList, classes);
    }

    /**