internal val streams = mutableMapOf<Int, Http2Stream>()
  internal val connectionName: String = builder.connectionName
  internal var lastGoodStreamId = 0

  /** http://tools.ietf.org/html/draft-ietf-httpbis-http2-17#section-5.1.1 */
  internal var nextStreamId = if (builder.client) 3 else 2

  private var isShutdown = false

  /** For scheduling everything asynchronous. */
  private val taskRunner = builder.taskRunner

                duplicateHostHelper.init();
            } catch (final Exception e) {
                logger.warn("Could not initialize duplicateHostHelper.", e);
            }

            // delete expired sessions
            crawlingInfoService.deleteSessionIdsBefore(options.sessionId, options.name, systemHelper.getCurrentTimeAsLong());

            final List<String> webConfigIdList = options.getWebConfigIdList();

     * [rfc_2616]: http://www.w3.org/Protocols/rfc2616/rfc2616.html
     * [rfc_7540]: https://tools.ietf.org/html/rfc7540
     * [rfc_7540_34]: https://tools.ietf.org/html/rfc7540#section-3.4
     *
     * @param protocols the protocols to use, in order of preference. If the list contains
     *     [Protocol.H2_PRIOR_KNOWLEDGE] then that must be the only protocol and HTTPS URLs will not

         */
        public int decrement() {
            return count.decrementAndGet();
        }
    }

    /**
     * Enumeration of predefined statistics actions that can be recorded
     * during crawler operations. Each action represents a specific event
     * or milestone in the crawling process.
     */
    public enum StatsAction {

 [okio_3_6_0]: https://square.github.io/okio/changelog/#version-360
 [public_suffix]: https://publicsuffix.org/
 [rfc_2045]: https://tools.ietf.org/html/rfc2045
 [rfc_7231_647]: https://tools.ietf.org/html/rfc7231#section-6.4.7
 [rfc_7692]: https://tools.ietf.org/html/rfc7692
 [semver]: https://semver.org/

 * prefer the simplest interface that satisfies your use case. See the <a
 * href="https://github.com/google/guava/wiki/GraphsExplained#choosing-the-right-graph-type">
 * "Choosing the right graph type"</a> section of the Guava User Guide for more details.
 *
 * <h3>Capabilities</h3>
 *
 * <p>{@code Network} supports the following use cases (<a
 * href="https://github.com/google/guava/wiki/GraphsExplained#definitions">definitions of

        // Test with another error status
        setStatus(response, NtStatus.NT_STATUS_INVALID_PARAMETER);
        assertTrue(response.isErrorResponseStatus());
    }

    @DisplayName("Should handle various file actions")
    @ParameterizedTest
    @CsvSource({ "1, FILE_ACTION_ADDED", "2, FILE_ACTION_REMOVED", "3, FILE_ACTION_MODIFIED", "4, FILE_ACTION_RENAMED_OLD_NAME",

    // places left to rotate.
    int m = -distance % length;
    m = (m < 0) ? m + length : m;
    // The current index of what will become the first element of the rotated section.
    int newFirstIndex = m + fromIndex;
    if (newFirstIndex == fromIndex) {
      return;
    }

    reverse(array, fromIndex, newFirstIndex);
    reverse(array, newFirstIndex, toIndex);

    // places left to rotate.
    int m = -distance % length;
    m = (m < 0) ? m + length : m;
    // The current index of what will become the first element of the rotated section.
    int newFirstIndex = m + fromIndex;
    if (newFirstIndex == fromIndex) {
      return;
    }

    reverse(array, fromIndex, newFirstIndex);
    reverse(array, newFirstIndex, toIndex);

 *  Fix: Don't leak connections when using ALPN on the desktop.
 *  Fix: Update Jetty ALPN to `7.1.2.v20141202` (Java 7) and `8.1.2.v20141202` (Java 8).
    This fixes a bug in resumed TLS sessions where the wrong protocol could be
    selected.
 *  Fix: Don't crash in SPDY and HTTP/2 when disconnecting before connecting.
 *  Fix: Avoid a reverse DNS-lookup for a numeric proxy address