return x.negate();
        }
      };

  /*
   * This list contains values that attempt to provoke overflow in integer operations. It contains
   * positive values on or near 2^N for N near multiples of 8 (near byte boundaries).
   */
  static final ImmutableSet<Integer> POSITIVE_INTEGER_CANDIDATES;

  static final Iterable<Integer> NEGATIVE_INTEGER_CANDIDATES;

      int jellyBean =
          (int) Class.forName("android.os.Build$VERSION_CODES").getField("JELLY_BEAN").get(null);
      /*
       * I assume that this check can't fail because JELLY_BEAN will be present only if we're
       * running under Jelly Bean or higher. But it seems safest to check.
       */
      if (version < jellyBean) {
        return new ThrowingCreator();
      }

    assertEquals("bar x 2", entry("bar", 2).toString());
  }

  public void testToStringNull() {
    assertEquals("null", entry(NE, 1).toString());
    assertEquals("null x 2", entry(NE, 2).toString());
  }

  public void testEquals() {
    assertEquals(control("foo", 1), entry("foo", 1));
    assertEquals(control("bar", 2), entry("bar", 2));

  private static final ImmutableSet<Cell<Character, Integer, String>> CELLS =
      ImmutableSet.of(
          Tables.immutableCell('a', 1, "foo"),
          Tables.immutableCell('b', 1, "bar"),
          Tables.immutableCell('a', 2, "baz"));

  private static final ImmutableSet<Character> ROW_SPACE = ImmutableSet.of('a', 'b');

  private static final ImmutableSet<Integer> COLUMN_SPACE = ImmutableSet.of(1, 2);

    String[] result = ObjectArrays.concat("foo", new String[] {"bar"});
    assertThat(result).asList().containsExactly("foo", "bar").inOrder();
  }

  public void testPrependTwoElements() {
    String[] result = ObjectArrays.concat("foo", new String[] {"bar", "baz"});
    assertThat(result).asList().containsExactly("foo", "bar", "baz").inOrder();
  }

  public void testAppendZeroElements() {

          "",
          " ",
          "127.0.0.1",
          "::1",
          "13",
          "abc.12c",
          "foo-.com",
          "_bar.quux",
          "foo+bar.com",
          "foo!bar.com",
          ".foo.com",
          "..bar.com",
          "baz..com",
          "..quiffle.com",
          "fleeb.com..",
          ".",
          "..",
          "...",

    multimap.put(new DerivedComparable("bar"), new DerivedComparable("b"));
    multimap.put(new DerivedComparable("bar"), new DerivedComparable("a"));
    multimap.put(new DerivedComparable("bar"), new DerivedComparable("r"));
    assertThat(multimap.keySet())
        .containsExactly(new DerivedComparable("bar"), new DerivedComparable("foo"))
        .inOrder();
    assertThat(multimap.values())

    multiset.add("foo", 2);
    multiset.add("bar");
    assertEquals(3, multiset.size());
    assertEquals(2, multiset.count("foo"));
    assertEquals("[foo x 2, bar]", multiset.toString());
  }

  public void testCreateFromIterable() {
    Multiset<String> multiset = TreeMultiset.create(Arrays.asList("foo", "bar", "foo"));
    assertEquals(3, multiset.size());
    assertEquals(2, multiset.count("foo"));

                    return new SampleElements<>(
                        Tables.immutableCell("bar", 1, 'a'),
                        Tables.immutableCell("bar", 2, 'b'),
                        Tables.immutableCell("bar", 3, (Character) null),
                        Tables.immutableCell("bar", 4, 'b'),
                        Tables.immutableCell("bar", 5, 'b'));
                  }

                  @Override

 *
 * <p>For example, an XML escaper would convert the literal string {@code "Foo<Bar>"} into {@code
 * "Foo&lt;Bar&gt;"} to prevent {@code "<Bar>"} from being confused with an XML tag. When the
 * resulting XML document is parsed, the parser API will return this text as the original literal
 * string {@code "Foo<Bar>"}.
 *
 * <p>An {@code Escaper} instance is required to be stateless, and safe when used concurrently by