Object[] unused2 = set.toArray(new Object[2]);
  }

  interface Interface extends Comparable<Interface> {}

  static class Impl implements Interface {
    static int nextId;
    Integer id = nextId++;

    @Override
    public int compareTo(Interface other) {
      return id.compareTo(((Impl) other).id);
    }
  }

  public void testOf_ordering_dupes() {

obvious how environment variables would be useful and applicable right away. But they keep showing up in many different scenarios when you are developing, so it's good to know about them.

For example, you will need this information in the next section, about [Virtual Environments](virtual-environments.md)....

        override fun runOnce(): Long {
          block()
          return -1L
        }
      },
      delayNanos,
    )
  }

  /** Returns a latch that reaches 0 when the queue is next idle. */
  fun idleLatch(): CountDownLatch {
    taskRunner.withLock {
      // If the queue is already idle, that's easy.
      if (activeTask == null && futureTasks.isEmpty()) {
        return CountDownLatch(0)

    filtered.put("a", 2);
    filtered.put("b", 4);
    assertEquals(ImmutableMap.of("a", 2, "b", 4), filtered);

    Entry<String, Integer> entry = filtered.entrySet().iterator().next();
    assertThrows(IllegalArgumentException.class, () -> entry.setValue(5));

    assertEquals(ImmutableMap.of("a", 2, "b", 4), filtered);
  }

  public void testFilteredValuesClear() {

        impl.releaseBuffer(b);

        // Assert: original array is zeroed in-place
        for (byte value : b) {
            assertEquals(0, value, "Released buffer must be zeroed");
        }

        // Next get should return the same instance from cache
        byte[] reused = impl.getBuffer();
        assertSame(b, reused, "Buffer should be reused from cache");
        // And it should still be zeroed

    }

    // ensures that the number of invocations looks sane
    void assertInvariants(int expectedBytes) {
      // we should have seen as many bytes as the next multiple of chunk after expectedBytes - 1
      assertEquals(out.toByteArray().length, ceilToMultiple(expectedBytes, chunkSize));
      assertEquals(expectedBytes / chunkSize, processCalled);

  @CollectionSize.Require(SEVERAL)
  public void testDescendingNavigation() {
    List<E> descending = new ArrayList<>();
    for (Iterator<E> i = navigableSet.descendingIterator(); i.hasNext(); ) {
      descending.add(i.next());
    }
    Collections.reverse(descending);
    assertEquals(values, descending);
  }

  public void testEmptySubSet() {
    NavigableSet<E> empty = navigableSet.subSet(e0(), false, e0(), false);

        // Credits
        SMBUtil.writeInt2(1, buffer, bufferIndex + 14);
        // Flags
        SMBUtil.writeInt4(1, buffer, bufferIndex + 16); // SMB2_FLAGS_SERVER_TO_REDIR
        // Next command
        SMBUtil.writeInt4(0, buffer, bufferIndex + 20);
        // Message ID
        SMBUtil.writeInt8(1, buffer, bufferIndex + 24);
        // Reserved/Async ID

 *    125 : Mapped inline to the sequence: [b2a, b3].
 *    126 : Mapped inline to the sequence: [b2, b3a].
 *    127 : Mapped inline to the sequence: [b2a, b3a].
 *
 * The range goes until the beginning of the next range.
 *
 * When b2 and b3 are unused, their values are set to 0x2d ('-').
 *
 * Section Index (1,240 bytes)
 * ===========================
 *

        // First release drops usage to zero and releases transport
        session.release();
        verify(transport, times(1)).release();
        assertFalse(session.isInUse());

        // Next release goes below zero and throws
        RuntimeException ex = assertThrows(RuntimeCIFSException.class, session::release);
        assertTrue(ex.getMessage().contains("below zero"));