A <code>nil</code> channel is never ready for communication.
</p>

<p>
A channel may be closed with the built-in function
<a href="#Close"><code>close</code></a>.
The multi-valued assignment form of the
<a href="#Receive_operator">receive operator</a>
reports whether a received value was sent before
the channel was closed.
</p>

<p>
A single channel may be used in

	}
	defer done(0, &err)

	return p.storage.WalkDir(ctx, opts, wr)
}

// WalkDir will traverse a directory and return all entries found.
// On success a meta cache stream will be returned, that should be closed when done.
func (client *storageRESTClient) WalkDir(ctx context.Context, opts WalkDirOptions, wr io.Writer) error {
	// Ensure remote has the same disk ID.
	opts.DiskID = *client.diskID.Load()

    } else if (cmp == 0) {
      switch (range.getLowerBoundType()) {
        case OPEN:
          return aggr.nodeAggregate(node) + aggr.treeAggregate(node.left);
        case CLOSED:
          return aggr.treeAggregate(node.left);
      }
      throw new AssertionError();
    } else {
      return aggr.treeAggregate(node.left)
          + aggr.nodeAggregate(node)

    of unacknowledged data per stream and no per-connection limit.

 *  Fix: Don't close a `Deflater` while we're still using it to compress a web socket message. We
    had a severe bug where web sockets were closed on the wrong thread, which caused
    `NullPointerException` crashes in `Deflater`.

 *  Fix: Don't crash after a web socket fails its connection upgrade. We incorrectly released

    assertFailsWith<ProtocolException> {
      CertificateAdapters.subjectPublicKeyInfo.fromDer(bytes)
    }.also { expected ->
      assertThat(expected.message).isEqualTo("enclosed object too large")
    }
  }

  /** Object identifiers are nominally self-delimiting. Outrun the limit with one. */
  @Test fun `variable length long outruns limit`() {
    val bytes = "060229ffffff7f".decodeHex()

        ) = TODO()

        override fun onClosing(
          webSocket: WebSocket,
          code: Int,
          reason: String,
        ) = TODO()

        override fun onClosed(
          webSocket: WebSocket,
          code: Int,
          reason: String,
        ) = TODO()

        override fun onFailure(
          webSocket: WebSocket,
          t: Throwable,

            }
        });
        nonPooledConnections.clear();

        activeConnections.set(0);
        log.info("Transport pool closed");
    }

    /**
     * Connection metrics for monitoring individual connections
     */
    private static class ConnectionMetrics {
        private final AtomicLong connectionsCreated = new AtomicLong(0);

            }

            // should we disconnect the transport here? otherwise we make an additional attempt to detect that if the
            // server closed the connection as a result
            log.debug("Disconnecting tree on send retry", last);
            disconnect(true);

            if (retries >= maxRetries) {
                break;
            }

   */
  fun timeoutEarlyExit() {
    check(!timeoutEarlyExit)
    timeoutEarlyExit = true
    timeout.exit()
  }

  /**
   * @param closeExchange true if the current exchange should be closed because it will not be used.
   *     This is usually due to either an exception or a retry.
   */
  internal fun exitNetworkInterceptorExchange(closeExchange: Boolean) {
    withLock {

   * - The second request discovers it "lost the race" and closes the connection it just opened.
   * - The second request uses the coalesced connection from request1.
   * - The coalesced connection is violently closed after servicing the first request.
   * - The second request discovers the coalesced connection is unhealthy just after acquiring it.
   */
  @Test
  fun coalescedConnectionDestroyedAfterAcquire() {