* to ["a", "b", ""].
     */
    private fun pop() {
      val removed = encodedPathSegments.removeAt(encodedPathSegments.size - 1)

      // Make sure the path ends with a '/' by either adding an empty string or clearing a segment.
      if (removed.isEmpty() && encodedPathSegments.isNotEmpty()) {
        encodedPathSegments[encodedPathSegments.size - 1] = ""
      } else {

      putNext(this, next);
    }

    void unpark() {
      // This is racy with removeWaiter. The consequence of the race is that we may spuriously call
      // unpark even though the thread has already removed itself from the list. But even if we did
      // use a CAS, that race would still exist (it would just be ever so slightly smaller).
      Thread w = thread;
      if (w != null) {
        thread = null;

            properties.putAll(props);
        }
        return update(properties);
    }

    public boolean update(MavenProperties properties) {
        boolean modified = false;
        // Remove "removed" properties from the cfg file
        for (String key : new ArrayList<String>(this.keySet())) {
            if (!properties.containsKey(key)) {
                this.remove(key);
                modified = true;

            properties.putAll(props);
        }
        return update(properties);
    }

    public boolean update(MavenProperties properties) {
        boolean modified = false;
        // Remove "removed" properties from the cfg file
        for (String key : new ArrayList<String>(this.keySet())) {
            if (!properties.containsKey(key)) {
                this.remove(key);
                modified = true;

        checkState(removeExact(requireNonNull(lastFromForgetMeNot)));
        lastFromForgetMeNot = null;
      }
    }

    /** Returns true if an exact reference (==) was found and removed from the supplied iterable. */
    private boolean foundAndRemovedExactReference(Iterable<E> elements, E target) {
      for (Iterator<E> it = elements.iterator(); it.hasNext(); ) {
        E element = it.next();

	select {
	case <-ctx.Done():
		return true
	default:
		return false
	}
}

// bgContext returns a context that can be used for async operations.
// Cancellation/timeouts are removed, so parent cancellations/timeout will
// not propagate from parent.
// Context values are preserved.
// This can be used for goroutines that live beyond the parent context.

  fun getStream(id: Int): Http2Stream? = withLock { streams[id] }

  internal fun removeStream(streamId: Int): Http2Stream? {
    withLock {
      val stream = streams.remove(streamId)

      // The removed stream may be blocked on a connection-wide window update.
      notifyAll()

      return stream
    }
  }

  internal fun updateConnectionFlowControl(read: Long) {
    withLock {

  }

  /**
   * Tests for Predicates.instanceOf(x). TODO: Fix the comment style after fixing annotation
   * stripper to remove comments properly. Currently, all tests before the comments are removed as
   * well.
   */
  @GwtIncompatible // Predicates.instanceOf
  public void testIsInstanceOf_apply() {
    Predicate<@Nullable Object> isInteger = Predicates.instanceOf(Integer.class);

		// console.Debugf("compacting %v, removing %d children\n", candidate, removing)

		flat.Compacted = true
		d.deleteRecursive(candidate)
		d.replaceHashed(candidate, nil, *flat)

		// Remove top entry and subtract removed children.
		remove -= removing
		leaves = leaves[1:]
	}
}

// forceCompact will force compact the cache of the top entry.
// If the number of children is more than limit*100, it will compact self.

   * an {@link IllegalArgumentException}. When methods such as {@code removeAll()} and {@code
   * clear()} are called on the filtered multiset, only elements that satisfy the filter will be
   * removed from the underlying multiset.
   *
   * <p>The returned multiset isn't threadsafe or serializable, even if {@code unfiltered} is.
   *