Thread.sleep(2000);

        // Clean up the thread
        indexUpdater.setFinishCrawling(true);
        indexUpdater.interrupt();
        indexUpdater.join(2000);

        // Test passes if no exception is thrown and thread terminates properly
        assertFalse("Thread should have terminated", indexUpdater.isAlive());
    }

    // Test run with component not available

            this.request = request;
        }

        /**
         * Parses the HTTP request to create a RequestParameter object.
         * @param request The HTTP servlet request containing the parameters
         * @return A new RequestParameter object with parsed values
         */
        protected static RequestParameter parse(final HttpServletRequest request) {
            final String query = request.getParameter("q");

   ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    @Resource
    protected CrawlerContainer crawlerContainer;

    /** Map of parser features to configure the DOM parser. */
    protected Map<String, String> featureMap = new HashMap<>();

    /** Map of parser properties to configure the DOM parser. */
    protected Map<String, String> propertyMap = new HashMap<>();

**Coroutine** is just the very fancy term for the thing returned by an `async def` function. Python knows that it is something like a function, that it can start and that it will end at some point, but that it might be paused ⏸ internally too, whenever there is an `await` inside of it.

        return loadBalancer.selectChannel(message);
    }

    /**
     * Handle channel failure
     *
     * @param channel failed channel
     * @param error error that caused failure
     */
    public void handleChannelFailure(ChannelInfo channel, Exception error) {
        failover.handleFailure(channel, error);
    }

    /**
     * Get channel for specific transport
     *

     */
    final State state;

    /** If true, the user requested a shutdown while the service was still starting up. */
    final boolean shutdownWhenStartupFinishes;

    /**
     * The exception that caused this service to fail. This will be {@code null} unless the service
     * has failed.
     */
    final @Nullable Throwable failure;

    StateSnapshot(State internalState) {
      this(internalState, false, null);

   *
   * @param string the string representation of a {@code float} value
   * @return the floating point value represented by {@code string}, or {@code null} if {@code
   *     string} has a length of zero or cannot be parsed as a {@code float} value
   * @throws NullPointerException if {@code string} is {@code null}
   * @since 14.0
   */
  @GwtIncompatible // regular expressions
  public static @Nullable Float tryParse(String string) {

    }

    /**
     * Parses project properties from the given path.
     *
     * @param propPath The path to the project properties file.
     * @throws FessSystemException if the properties file cannot be parsed.
     */
    protected void parseProjectProperties(final Path propPath) {

  }

  /**
   * This is adapted from the regex suggested by {@link Double#valueOf(String)} for prevalidating
   * inputs. All valid inputs must pass this regex, but it's semantically fine if not all inputs
   * that pass this regex are valid -- only a performance hit is incurred, not a semantics bug.
   */
  @GwtIncompatible // regular expressions
  static final
  java.util.regex.Pattern