private static final double ALLOWED_ERROR = 1e-10;

  public void testMappingAnd_regular() {
    double x1 = 1.2;
    double y1 = 3.4;
    double xDelta = 5.6;
    double yDelta = 7.8;
    LinearTransformation transformation =
        LinearTransformation.mapping(x1, y1).and(x1 + xDelta, y1 + yDelta);
    assertDiagonalLinearTransformation(transformation, x1, y1, xDelta, yDelta);
  }

  private static final double ALLOWED_ERROR = 1e-10;

  public void testMappingAnd_regular() {
    double x1 = 1.2;
    double y1 = 3.4;
    double xDelta = 5.6;
    double yDelta = 7.8;
    LinearTransformation transformation =
        LinearTransformation.mapping(x1, y1).and(x1 + xDelta, y1 + yDelta);
    assertDiagonalLinearTransformation(transformation, x1, y1, xDelta, yDelta);
  }

    } else {
      // count how many bytes we'll need to express the length.
      val lengthBitCount = 64 - java.lang.Long.numberOfLeadingZeros(length)
      val lengthByteCount = (lengthBitCount + 7) / 8
      sink.writeByte(0b1000_0000 or lengthByteCount)
      for (shift in (lengthByteCount - 1) * 8 downTo 0 step 8) {
        sink.writeByte((length shr shift).toInt())
      }
    }

    // Write the payload.

    - [Client Binaries](#client-binaries-7)
    - [Server Binaries](#server-binaries-7)
    - [Node Binaries](#node-binaries-7)
  - [Changelog since v1.7.8](#changelog-since-v178)
    - [Other notable changes](#other-notable-changes-7)
- [v1.7.8](#v178)
  - [Downloads for v1.7.8](#downloads-for-v178)
    - [Client Binaries](#client-binaries-8)
    - [Server Binaries](#server-binaries-8)
    - [Node Binaries](#node-binaries-8)

    stopwatch.reset();
    assertFalse(stopwatch.isRunning());
    ticker.advance(3);
    assertEquals(0, stopwatch.elapsed(NANOSECONDS));
  }

  public void testElapsed_whileRunning() {
    ticker.advance(78);
    stopwatch.start();
    assertEquals(0, stopwatch.elapsed(NANOSECONDS));

    ticker.advance(345);
    assertEquals(345, stopwatch.elapsed(NANOSECONDS));
  }

  public void testElapsed_notRunning() {

        multimap = create();
        multimap.putAll("foo", asList(2, 3));
        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();
      }

    assertTrue(Range.closed(3, 7).isConnected(Range.open(6, 8)));
    assertTrue(Range.open(3, 7).isConnected(Range.closed(5, 6)));
    assertFalse(Range.closed(3, 5).isConnected(Range.closed(7, 8)));
    assertFalse(Range.closed(3, 5).isConnected(Range.closedOpen(7, 7)));
  }

  private static void checkContains(Range<Integer> range) {
    assertFalse(range.contains(4));
    assertTrue(range.contains(5));

    assertTrue(Range.closed(3, 7).isConnected(Range.open(6, 8)));
    assertTrue(Range.open(3, 7).isConnected(Range.closed(5, 6)));
    assertFalse(Range.closed(3, 5).isConnected(Range.closed(7, 8)));
    assertFalse(Range.closed(3, 5).isConnected(Range.closedOpen(7, 7)));
  }

  private static void checkContains(Range<Integer> range) {
    assertFalse(range.contains(4));
    assertTrue(range.contains(5));

  }

  public void testConcatVarargs() {
    List<Integer> list1 = newArrayList(1);
    List<Integer> list2 = newArrayList(4);
    List<Integer> list3 = newArrayList(7, 8);
    List<Integer> list4 = newArrayList(9);
    List<Integer> list5 = newArrayList(10);
    Iterable<Integer> result = Iterables.concat(list1, list2, list3, list4, list5);

    checkConcurrencyLevel(2, 2);
    checkConcurrencyLevel(3, 4);
    checkConcurrencyLevel(4, 4);
    checkConcurrencyLevel(5, 8);
    checkConcurrencyLevel(6, 8);
    checkConcurrencyLevel(7, 8);
    checkConcurrencyLevel(8, 8);
  }

  private static void checkConcurrencyLevel(int concurrencyLevel, int segmentCount) {
    MapMakerInternalMap<Object, Object, ?, ?> map =