/**
   * Returns the single element contained in {@code iterator}.
   *
   * @throws NoSuchElementException if the iterator is empty
   * @throws IllegalArgumentException if the iterator contains multiple elements. The state of the
   *     iterator is unspecified.
   */
  @ParametricNullness
  public static <T extends @Nullable Object> T getOnlyElement(Iterator<T> iterator) {
    T first = iterator.next();
    if (!iterator.hasNext()) {

of any Contributor under this Agreement, whether expressly, by implication,
estoppel or otherwise. All rights in the Program not expressly granted under
this Agreement are reserved.

This Agreement is governed by the laws of the State of New York and the intellectual
property laws of the United States of America. No party to this Agreement
will bring a legal action under this Agreement more than one year after the

	// Allow at most 5 requests per second. This is still a ridiculous amount; at most we should have 2 ztunnels on our node,
	// and they will only connect once and persist.
	// However, if they do get in a state where they call us in a loop, we will quickly OOM
	limit := rate.NewLimiter(rate.Limit(5), 1)
	for {
		log.Debug("accepting conn")
		if err := limit.Wait(ctx); err != nil {

		return true
	}
	return false
}

// MarkOffline - will mark a client as being offline and spawns
// a goroutine that will attempt to reconnect if HealthCheckFn is set.
// returns true if the node changed state from online to offline
func (c *Client) MarkOffline(err error) bool {
	c.Lock()
	c.lastErr = err
	c.lastErrTime = time.Now()
	atomic.StoreInt64(&c.lastConn, time.Now().UnixNano())
	c.Unlock()

   * value. Note that multiple threads can concurrently load values for distinct keys.
   *
   * <p>This method does not alter the state of this {@code CacheBuilder} instance, so it can be
   * invoked again to create multiple independent caches.
   *
   * @param loader the cache loader used to obtain new values

LICENSE (CDDL)

The code released under the CDDL shall be governed by the laws of the
State of California (excluding conflict-of-law provisions). Any
litigation relating to this License shall be subject to the jurisdiction
of the Federal Courts of the Northern District of California and the
state courts of the State of California, with venue lying in Santa Clara
County, California.

      reproduction, and distribution of the Work otherwise complies with
      the conditions stated in this License.

   5. Submission of Contributions. Unless You explicitly state otherwise,
      any Contribution intentionally submitted for inclusion in the Work
      by You to the Licensor shall be under the terms and conditions of
      this License, without any additional terms or conditions.

es/1873#issuecomment-152293725 for more details\n@mixin form-validation-state-selector($state) {\n  @if ($state == \"valid\" or $state == \"invalid\") {\n    .was-validated #{if(&, \"&\", \"\")}:#{$state},\n    #{if(&, \"&\", \"\")}.is-#{$state} {\n      @content;\n    }\n  } @else {\n    #{if(&, \"&\", \"\")}.is-#{$state} {\n      @content;\n    }\n  }\n}\n\n@mixin form-validation-state($state, $color, $icon) {\n  .#{$state}-feedback {\n    display: none;\n    width: 100%;\n    margin-top: $for...

      super(16);
    }

    private boolean finished = false;

    /*
     * This trick allows us to avoid having separate states for "first four ints" and "all other
     * four int chunks."  The state we want after the first four bytes is
     *
     * crc0 = ~int0
     * crc1 = int1
     * crc2 = int2
     * crc3 = int3
     *

// doPing checks last ping time and sends another ping.
func (m *muxClient) doPing(respHandler chan<- Response) (ok bool) {
	m.respMu.Lock()
	if m.closed {
		m.respMu.Unlock()
		// Already closed. This is not an error state;
		// we may just be delivering the last responses.
		return true
	}

	// Only check ping when not closed.
	if got := time.Since(time.Unix(0, atomic.LoadInt64(&m.LastPong))); got > m.clientPingInterval*2 {