private final EventBus bus;
    private final List<StringCatcher> catchers;

    Registrator(EventBus bus, List<StringCatcher> catchers) {
      this.bus = bus;
      this.catchers = catchers;
    }

    @Override
    public void run() {
      StringCatcher catcher = new StringCatcher();
      bus.register(catcher);
      catchers.add(catcher);
    }
  }

  /**
   * A collector for DeadEvents.

    private final EventBus bus;
    private final List<StringCatcher> catchers;

    Registrator(EventBus bus, List<StringCatcher> catchers) {
      this.bus = bus;
      this.catchers = catchers;
    }

    @Override
    public void run() {
      StringCatcher catcher = new StringCatcher();
      bus.register(catcher);
      catchers.add(catcher);
    }
  }

  /**
   * A collector for DeadEvents.

   * declaredType}. Example usage:
   *
   * <pre>
   * try {
   *   someMethodThatCouldThrowAnything();
   * } catch (IKnowWhatToDoWithThisException e) {
   *   handle(e);
   * } catch (Throwable t) {
   *   Throwables.propagateIfInstanceOf(t, IOException.class);
   *   Throwables.propagateIfInstanceOf(t, SQLException.class);
   *   throw Throwables.propagate(t);
   * }

   * declaredType}. Example usage:
   *
   * <pre>
   * try {
   *   someMethodThatCouldThrowAnything();
   * } catch (IKnowWhatToDoWithThisException e) {
   *   handle(e);
   * } catch (Throwable t) {
   *   Throwables.propagateIfInstanceOf(t, IOException.class);
   *   Throwables.propagateIfInstanceOf(t, SQLException.class);
   *   throw Throwables.propagate(t);
   * }

  }

  /**
   * A reference implementation for {@code tryParse} that just catches the exception from {@link
   * Float#valueOf}.
   */
  private static @Nullable Float referenceTryParse(String input) {
    if (input.trim().length() < input.length()) {
      return null;
    }
    try {
      return Float.valueOf(input);
    } catch (NumberFormatException e) {
      return null;
    }
  }

      Pattern pattern = Pattern.compile("Multiple entries with same key: four=(.*) and four=(.*)");
      assertThat(expected).hasMessageThat().matches(pattern);
      Matcher matcher = pattern.matcher(expected.getMessage());
      assertThat(matcher.matches()).isTrue();
      assertThat(matcher.group(1)).isNotEqualTo(matcher.group(2));
    }
  }

  public void testOf() {
    assertMapEquals(ImmutableMap.of("one", 1), "one", 1);

    assertTrue(matcher.matches(s.charAt(0)));
    assertTrue(matcher.apply(s.charAt(0)));
    assertEquals(0, matcher.indexIn(s));
    assertEquals(0, matcher.indexIn(s, 0));
    assertEquals(-1, matcher.indexIn(s, 1));
    assertEquals(0, matcher.lastIndexIn(s));
    assertTrue(matcher.matchesAnyOf(s));
    assertTrue(matcher.matchesAllOf(s));
    assertFalse(matcher.matchesNoneOf(s));

    assertTrue(matcher.matches(s.charAt(0)));
    assertTrue(matcher.apply(s.charAt(0)));
    assertEquals(0, matcher.indexIn(s));
    assertEquals(0, matcher.indexIn(s, 0));
    assertEquals(-1, matcher.indexIn(s, 1));
    assertEquals(0, matcher.lastIndexIn(s));
    assertTrue(matcher.matchesAnyOf(s));
    assertTrue(matcher.matchesAllOf(s));
    assertFalse(matcher.matchesNoneOf(s));

  private static void checkTryParse(String input) {
    Double expected = referenceTryParse(input);
    assertThat(Doubles.tryParse(input)).isEqualTo(expected);
    if (expected != null && !Doubles.FLOATING_POINT_PATTERN.matcher(input).matches()) {
      // TODO(cpovirk): Use SourceCodeEscapers if it is added to Guava.
      StringBuilder escapedInput = new StringBuilder();
      for (char c : input.toCharArray()) {
        if (c >= 0x20 && c <= 0x7E) {

  private static void checkTryParse(String input) {
    Double expected = referenceTryParse(input);
    assertThat(Doubles.tryParse(input)).isEqualTo(expected);
    if (expected != null && !Doubles.FLOATING_POINT_PATTERN.matcher(input).matches()) {
      // TODO(cpovirk): Use SourceCodeEscapers if it is added to Guava.
      StringBuilder escapedInput = new StringBuilder();
      for (char c : input.toCharArray()) {
        if (c >= 0x20 && c <= 0x7E) {