* java.util.stream.Collectors#toMap(java.util.function.Function, java.util.function.Function,
   * BinaryOperator, java.util.function.Supplier)}, this Collector throws a {@code
   * NullPointerException} on null values returned from {@code valueFunction}, and treats nulls
   * returned from {@code mergeFunction} as removals of that row/column pair.
   *
   * @since 33.2.0 (available since 21.0 in guava-jre)
   */

     * field.
     */
    @GwtTransient private final String justAfterNull;

    protected NullsBefore(String justAfterNull) {
      if (justAfterNull == null) {
        throw new NullPointerException();
      }

      this.justAfterNull = justAfterNull;
    }

    @Override
    public int compare(@Nullable String lhs, @Nullable String rhs) {
      if (lhs == rhs) {
        return 0;

  }

  public void testWithParametersIterable_nullValue() {
    MediaType mediaType = MediaType.parse("text/plain");
    assertThrows(
        NullPointerException.class,
        () -> mediaType.withParameters("a", Arrays.asList((String) null)));
  }

  public void testWithCharset() {
    assertEquals(
        MediaType.parse("text/plain; charset=utf-8"),

      assertThat(Stats.fromByteArray(statsByteArray)).isEqualTo(stats);
    }
  }

  public void testFromByteArray_withNullInputThrowsNullPointerException() {
    assertThrows(NullPointerException.class, () -> Stats.fromByteArray(null));
  }

  public void testFromByteArray_withEmptyArrayInputThrowsIllegalArgumentException() {

    Comparable<Object> comparable = ArbitraryInstances.get(Comparable.class);
    assertEquals(0, comparable.compareTo(comparable));
    assertTrue(comparable.compareTo("") > 0);
    assertThrows(NullPointerException.class, () -> comparable.compareTo(null));
  }

  public void testGet_array() {
    assertThat(ArbitraryInstances.get(int[].class)).isEmpty();
    assertThat(ArbitraryInstances.get(Object[].class)).isEmpty();

   *   <li>All visible static methods are checked such that passing null for any parameter that's
   *       not annotated nullable (according to the rules of {@link NullPointerTester}) should throw
   *       {@link NullPointerException}.
   *   <li>If there is any visible constructor or visible static factory method declared by the
   *       class, all visible instance methods will be checked too using the instance created by

   *
   * @throws ClassCastException if the values are not mutually comparable
   * @throws NoSuchElementException if {@code values} is empty
   * @throws NullPointerException if any of {@code values} is null
   * @since 14.0
   */
  public static <C extends Comparable<?>> Range<C> encloseAll(Iterable<C> values) {
    checkNotNull(values);
    if (values instanceof SortedSet) {

   * returns a new {@code InternetDomainName} with the value {@code www.bar.foo.com}. Only lenient
   * validation is performed, as described {@link #from(String) here}.
   *
   * @throws NullPointerException if leftParts is null
   * @throws IllegalArgumentException if the resulting name is not valid
   */
  public InternetDomainName child(String leftParts) {
    return from(checkNotNull(leftParts) + "." + name);
  }

    assertThrows(
        IllegalArgumentException.class,
        () -> inducedSubgraph(undirectedGraph, ImmutableSet.of(N1)));
  }

  @Test
  public void copyOf_nullArgument() {
    assertThrows(NullPointerException.class, () -> copyOf((Graph<?>) null));
  }

  @Test
  public void copyOf_directedGraph() {
    Graph<Integer> directedGraph = buildDirectedGraph();

    Graph<Integer> copy = copyOf(directedGraph);

    assertThrows(
        IllegalArgumentException.class,
        () -> {
          Set<Set<Integer>> unused = powerSet(ContiguousSet.closed(0, Integer.MAX_VALUE / 2));
        });

    assertThrows(NullPointerException.class, () -> powerSet(singleton(null)));
  }

  public void testPowerSetEqualsAndHashCode_verifyAgainstHashSet() {
    ImmutableList<Integer> allElements =
        ImmutableList.of(