FluentIterable<String> iterable = FluentIterable.from(Lists.newArrayList("cool", "pants"));
    assertThat(iterable.firstMatch(Predicates.equalTo("cool"))).hasValue("cool");
    assertThat(iterable.firstMatch(Predicates.equalTo("pants"))).hasValue("pants");
    assertThat(iterable.firstMatch(Predicates.alwaysFalse())).isAbsent();
    assertThat(iterable.firstMatch(Predicates.alwaysTrue())).hasValue("cool");
  }

                    multimap.put("foo", 16);
                    multimap =
                        Multimaps.filterKeys(multimap, Predicates.not(Predicates.equalTo("foo")));
                    return Multimaps.filterKeys(
                        multimap, Predicates.not(Predicates.equalTo("bar")));
                  }
                })
            .named("Multimaps.filterKeys[Multimaps.filterKeys[ListMultimap], Predicate]")

                    multimap.put("foo", 16);
                    multimap =
                        Multimaps.filterKeys(multimap, Predicates.not(Predicates.equalTo("foo")));
                    return Multimaps.filterKeys(
                        multimap, Predicates.not(Predicates.equalTo("bar")));
                  }
                })
            .named("Multimaps.filterKeys[Multimaps.filterKeys[ListMultimap], Predicate]")

    doTestSetBits(anyOf("xy"));
    doTestSetBits(anyOf("CharMatcher"));
    doTestSetBits(noneOf("CharMatcher"));
    doTestSetBits(inRange('n', 'q'));
    doTestSetBits(forPredicate(Predicates.equalTo('c')));
    doTestSetBits(CharMatcher.ascii());
    doTestSetBits(CharMatcher.digit());
    doTestSetBits(CharMatcher.invisible());
    doTestSetBits(CharMatcher.whitespace());

    doTestSetBits(anyOf("xy"));
    doTestSetBits(anyOf("CharMatcher"));
    doTestSetBits(noneOf("CharMatcher"));
    doTestSetBits(inRange('n', 'q'));
    doTestSetBits(forPredicate(Predicates.equalTo('c')));
    doTestSetBits(CharMatcher.ascii());
    doTestSetBits(CharMatcher.digit());
    doTestSetBits(CharMatcher.invisible());
    doTestSetBits(CharMatcher.whitespace());

  }

  public void testComposeOfPredicateAndFunctionIsAssociative() {
    Map<Float, String> m = ImmutableMap.of(4.0f, "A", 3.0f, "B", 2.0f, "C", 1.0f, "D");
    Predicate<? super Integer> h = Predicates.equalTo(42);
    Function<? super String, Integer> g = new HashCodeFunction();
    Function<Float, String> f = Functions.forMap(m, "F");

    Predicate<Float> p1 = Predicates.compose(Predicates.compose(h, g), f);

  }

  public void testComposeOfPredicateAndFunctionIsAssociative() {
    Map<Float, String> m = ImmutableMap.of(4.0f, "A", 3.0f, "B", 2.0f, "C", 1.0f, "D");
    Predicate<? super Integer> h = Predicates.equalTo(42);
    Function<? super String, Integer> g = new HashCodeFunction();
    Function<Float, String> f = Functions.forMap(m, "F");

    Predicate<Float> p1 = Predicates.compose(Predicates.compose(h, g), f);

    }

    boolean hasAnyPositiveInfinity() {
      return Iterables.any(values, Predicates.equalTo(POSITIVE_INFINITY));
    }

    boolean hasAnyNegativeInfinity() {
      return Iterables.any(values, Predicates.equalTo(NEGATIVE_INFINITY));
    }

    boolean hasAnyNaN() {
      return Iterables.any(values, Predicates.equalTo(NaN));
    }

    boolean hasAnyNonFinite() {

  }

  /**
   * Returns a predicate that evaluates to {@code true} if the object being tested {@code equals()}
   * the given target or both are null.
   */
  public static <T extends @Nullable Object> Predicate<T> equalTo(@ParametricNullness T target) {
    return (target == null)
        ? Predicates.<T>isNull()
        : new IsEqualToPredicate(target).withNarrowedType();
  }

  /**

  }

  /**
   * Returns a predicate that evaluates to {@code true} if the object being tested {@code equals()}
   * the given target or both are null.
   */
  public static <T extends @Nullable Object> Predicate<T> equalTo(@ParametricNullness T target) {
    return (target == null)
        ? Predicates.<T>isNull()
        : new IsEqualToPredicate(target).withNarrowedType();
  }

  /**