stopwatch.start();
    assertEquals(9, stopwatch.elapsed(NANOSECONDS));
    ticker.advance(25);
    assertEquals(34, stopwatch.elapsed(NANOSECONDS));

    stopwatch.stop();
    ticker.advance(36);
    assertEquals(34, stopwatch.elapsed(NANOSECONDS));
  }

  public void testElapsed_micros() {
    stopwatch.start();
    ticker.advance(999);
    assertEquals(0, stopwatch.elapsed(MICROSECONDS));

    assertThat(multimap.values()).containsExactly(2, 4, 3, 6, 5, 2).inOrder();
    assertThat(multimap.get("a")).containsExactly(5, 2).inOrder();
    assertThat(multimap.get("b")).containsExactly(3, 6).inOrder();
  }

  public void testBuilderOrderKeysByDuplicates() {
    ImmutableListMultimap.Builder<String, Integer> builder = ImmutableListMultimap.builder();
    builder.put("bb", 3);
    builder.put("d", 2);

    assertThat(multimap.values()).containsExactly(2, 4, 3, 6, 5, 2).inOrder();
    assertThat(multimap.get("a")).containsExactly(5, 2).inOrder();
    assertThat(multimap.get("b")).containsExactly(3, 6).inOrder();
    assertFalse(multimap.get("a") instanceof ImmutableSortedSet);
    assertFalse(multimap.get("x") instanceof ImmutableSortedSet);
    assertFalse(multimap.asMap().get("a") instanceof ImmutableSortedSet);
  }

    assertThat(multimap.values()).containsExactly(2, 4, 3, 6, 5, 2).inOrder();
    assertThat(multimap.get("a")).containsExactly(5, 2).inOrder();
    assertThat(multimap.get("b")).containsExactly(3, 6).inOrder();
    assertFalse(multimap.get("a") instanceof ImmutableSortedSet);
    assertFalse(multimap.get("x") instanceof ImmutableSortedSet);
    assertFalse(multimap.asMap().get("a") instanceof ImmutableSortedSet);
  }

  @J2ktIncompatible
  @GwtIncompatible // used only from suite
  @AndroidIncompatible
  public static class SampleLongs extends SampleElements<Long> {
    public SampleLongs() {
      super(1L << 31, 1L << 33, 1L << 36, 1L << 40, 1L << 45);
    }
  }

    assertFalse(range.encloses(Range.openClosed(2, 5)));
    assertFalse(range.encloses(Range.closedOpen(2, 5)));
    assertFalse(range.encloses(Range.closed(1, 4)));
    assertFalse(range.encloses(Range.closed(3, 6)));
    assertFalse(range.encloses(Range.greaterThan(3)));
    assertFalse(range.encloses(Range.lessThan(3)));
    assertFalse(range.encloses(Range.atLeast(3)));
    assertFalse(range.encloses(Range.atMost(3)));

## 🚀 Getting Started

### Requirements
- **Java 21 or higher** (Required for modern language features)
- **Maven 3.6+** or **Gradle 7+** for build management
- **Optional**: SLF4J or Commons Logging for logging support

### Maven Dependency
```xml
<dependency>
    <groupId>org.codelibs</groupId>
    <artifactId>corelib</artifactId>

    assertEquals(0x000033, (int) webSafeColorArray[1]);
    assertEquals(0x000066, (int) webSafeColorArray[2]);
    assertEquals(0x003300, (int) webSafeColorArray[6]);
    assertEquals(0x330000, (int) webSafeColorArray[36]);
    assertEquals(0x000066, (int) webSafeColors.get(2));
    assertEquals(0x003300, (int) webSafeColors.get(6));
    ImmutableList<Integer> addedColor = webSafeColorsBuilder.add(0x00BFFF).build();
    assertEquals(

    assertEquals(0x000033, (int) webSafeColorArray[1]);
    assertEquals(0x000066, (int) webSafeColorArray[2]);
    assertEquals(0x003300, (int) webSafeColorArray[6]);
    assertEquals(0x330000, (int) webSafeColorArray[36]);
    assertEquals(0x000066, (int) webSafeColors.get(2));
    assertEquals(0x003300, (int) webSafeColors.get(6));
    ImmutableList<Integer> addedColor = webSafeColorsBuilder.add(0x00BFFF).build();
    assertEquals(

    assertEquals(0x000033, (int) webSafeColorArray[1]);
    assertEquals(0x000066, (int) webSafeColorArray[2]);
    assertEquals(0x003300, (int) webSafeColorArray[6]);
    assertEquals(0x330000, (int) webSafeColorArray[36]);
    ImmutableSet<Integer> addedColor = webSafeColorsBuilder.add(LAST_COLOR_ADDED).build();
    assertEquals(
        "Modifying the builder should not have changed any already built sets",
        216,