checkNonNegative(--successorCount);

      if (orderedNodeConnections != null) {
        orderedNodeConnections.remove(new NodeConnection.Succ<>((N) node));
      }
    }

    /*
     * TODO(cpovirk): `return (V) removedValue` once our checker permits that.
     *
     * (We promoted a class of warnings into errors because sometimes they indicate real problems.

   *
   * <p>Without special handling, it's possible to have reads of the open stream start <i>before</i>
   * the offset at which the slice is supposed to start.
   */
  // TODO(cgdecker): Maybe add a test for this to ByteSourceTester
  public void testSlice_appendingAfterSlicing() throws IOException {
    // Source of length 5

     */
    public void cleanup(final String sessionId) {
        if (logger.isInfoEnabled()) {
            logger.info("Starting crawler cleanup: sessionId={}", sessionId);
        }
        try {
            // TODO transaction?
            urlQueueService.delete(sessionId);
            dataService.delete(sessionId);
            urlFilter.clear();
            if (logger.isInfoEnabled()) {

            if (matchOutput == null) {
                start++;
                continue;
            }

            synonyms.add(new MyToken(key, start, longestMatchEndOffset, 1, matchOutput.clone(), ignoreCase)); // TODO
                                                                                                              // synonym
            start = longestMatchEndOffset;
        }
    }

   * @throws ArithmeticException if {@code mode} is {@link RoundingMode#UNNECESSARY} and {@code x}
   *     is not a power of two
   */
  @SuppressWarnings("fallthrough")
  // TODO(kevinb): remove after this warning is disabled globally
  public static int log2(int x, RoundingMode mode) {
    checkPositive("x", x);
    switch (mode) {
      case UNNECESSARY:

    @Override
    public Integer getTimeToLive() {
        String value = getHandlerParameterMap().get("time_to_live");
        if (StringUtil.isBlank(value)) {
            value = getHandlerParameterMap().get("timeToLive"); // TODO remove
            if (StringUtil.isBlank(value)) {
                return null;
            }
            logger.warn("timeToLive is deprecated. Please use time_to_live.");
        }
        try {

    TimedWaiterThread waiter = new TimedWaiterThread(future, Long.MAX_VALUE, SECONDS);
    waiter.start();
    waiter.awaitWaiting();

    future.set(1);
    waiter.join();
  }

  @J2ktIncompatible // TODO(b/324550390): Enable
  public void testSetNull() throws Exception {
    future.set(null);
    assertSuccessful(future, null);
  }

  @SuppressWarnings("nullness") // test of a bogus call

 */
@DoNotMock("Use ImmutableTable, HashBasedTable, or another implementation")
@GwtCompatible
public interface Table<
    R extends @Nullable Object, C extends @Nullable Object, V extends @Nullable Object> {
  // TODO(jlevy): Consider adding methods similar to ConcurrentMap methods.

  // Accessors

  /**
   * Returns {@code true} if the table contains a mapping with the specified row and column keys.
   *

   |-->
  <pluginGroups>
    <!-- pluginGroup
     | Specifies a further group identifier to use for plugin lookup.
    <pluginGroup>com.your.plugins</pluginGroup>
    -->
  </pluginGroups>

  <!-- TODO Since when can proxies be selected as depicted? -->
  <!-- proxies
   | This is a list of proxies which can be used on this machine to connect to the network.

    /**
     * Saves the session state (currently not implemented).
     *
     * @param sessionId The session ID.
     */
    @Override
    public void saveSession(final String sessionId) {
        // TODO use cache
    }

    /**
     * Checks if a URL has been visited by looking in both the queue and access results.
     *
     * @param urlQueue The URL queue entry to check.