}

    @Override
    public boolean removeAll(Collection<?> c) {
      if (c.isEmpty()) {
        return false;
      }
      int oldSize = size(); // calls refreshIfEmpty

      // Guava issue 1013: AbstractSet and most JDK set implementations are
      // susceptible to quadratic removeAll performance on lists;
      // use a slightly smarter implementation here

     * is just more than the set's size.  We augment the test by
     * assuming that sets have fast contains() performance, and other
     * collections don't.  See
     * https://github.com/google/guava/issues/1013
     */
    if (collection instanceof Set && collection.size() > set.size()) {
      return Iterators.removeAll(set.iterator(), collection);
    } else {
      return removeAllImpl(set, collection.iterator());

      Route(
        factory.newAddress(uriHost = "1.2.3.4", uriPort = 1003),
        Proxy.NO_PROXY,
        InetSocketAddress(ipv4Address, 1003),
      ).toString(),
    ).isEqualTo("1.2.3.4:1003")
    assertThat(
      Route(
        factory.newAddress(uriHost = "example.com", uriPort = 1003),
        Proxy.NO_PROXY,
        InetSocketAddress(ipv4Address, 1003),
      ).toString(),
    ).isEqualTo("example.com at 1.2.3.4:1003")

    val clientReason = "unexpected Sec-WebSocket-Extensions in response header"
    serverListener.assertClosing(1010, clientReason)
    server.close(1010, "")
    clientListener.assertClosing(1010, "")
    clientListener.assertClosed(1010, "")
    serverListener.assertClosed(1010, clientReason)
    clientListener.assertExhausted()
    serverListener.assertExhausted()
  }

            assertEquals(0, response.writeDataWireFormat(buffer, i * 10));
            assertEquals(0, response.readSetupWireFormat(buffer, i * 10, 10));
            assertEquals(0, response.readParametersWireFormat(buffer, i * 10, 10));
            assertEquals(0, response.readDataWireFormat(buffer, i * 10, 10));
        }
    }

    @Test
    @DisplayName("Test toString contains proper class name")
    void testToStringFormat() {

        multimap.putAll("bar", asList(4, 5));
        multimap.putAll("foo", asList(6));
        multimap.putAll("baz", asList(7, 8));
        multimap.putAll("dog", asList(9));
        multimap.putAll("bar", asList(10, 11));
        multimap.putAll("cat", asList(12, 13, 14));
        return multimap.keySet().iterator();
      }

      @Override
      protected void verify(List<String> elements) {

    assertThat(Doubles.contains(EMPTY, 1.0)).isFalse();
    assertThat(Doubles.contains(ARRAY1, 2.0)).isFalse();
    assertThat(Doubles.contains(ARRAY234, 1.0)).isFalse();
    assertThat(Doubles.contains(new double[] {-1.0}, -1.0)).isTrue();
    assertThat(Doubles.contains(ARRAY234, 2.0)).isTrue();
    assertThat(Doubles.contains(ARRAY234, 3.0)).isTrue();
    assertThat(Doubles.contains(ARRAY234, 4.0)).isTrue();

    }

    @Test
    @DisplayName("Test safe integer multiplication")
    void testSafeMultiplication() {
        assertEquals(100, InputValidator.safeMultiply(10, 10));
        assertEquals(-100, InputValidator.safeMultiply(10, -10));

        assertThrows(ArithmeticException.class, () -> InputValidator.safeMultiply(Integer.MAX_VALUE, 2));

    // separate above
    expected =
        assertThrows(
            IllegalArgumentException.class, () -> range.intersection(Range.closed(10, 12)));
    assertThat(expected).hasMessageThat().contains("connected");
  }

  public void testGap_overlapping() {
    Range<Integer> range = Range.closedOpen(3, 5);

        in 5..7 -> {
          data.writeByte('\n'.code) // 'data' on a line of its own.
        }

        in 8..9 -> {
          id = source.readUtf8LineStrict().takeIf { it.isNotEmpty() }
        }

        in 10..12 -> {
          id = null // 'id' on a line of its own.
        }

        in 13..14 -> {
          type = source.readUtf8LineStrict().takeIf { it.isNotEmpty() }
        }

        in 15..17 -> {