*
 * <p>Subclasses are guaranteed that the life cycle methods ({@link #runOneIteration}, {@link
 * #startUp} and {@link #shutDown}) will never run concurrently. Notably, if any execution of {@link
 * #runOneIteration} takes longer than its schedule defines, then subsequent executions may start

import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collector;
import java.util.stream.Stream;
import org.jspecify.annotations.Nullable;

/**
 * A {@link SetMultimap} whose contents will never change, with many other important properties
 * detailed at {@link ImmutableCollection}.
 *
 * <p><b>Warning:</b> As in all {@link SetMultimap}s, do not modify either a key <i>or a value</i>

    }
  }

  // TODO(lukes): Investigate using a @Contended annotation on these fields once one is available.

  /*
   * The following fields are package-private, even though we intend never to use them outside this
   * file. If they were instead private, then we wouldn't be able to access them reflectively from
   * within VarHandleAtomicHelper and AtomicReferenceFieldUpdaterAtomicHelper.
   *

   *     to the number of allowed column keys
   */
  public @Nullable V at(int rowIndex, int columnIndex) {
    // In GWT array access never throws IndexOutOfBoundsException.
    checkElementIndex(rowIndex, rowList.size());
    checkElementIndex(columnIndex, columnList.size());
    return array[rowIndex][columnIndex];
  }

  /**

   *
   * lockA.lock();  // reentrant acquisition is okay
   * }
   *
   * <p>It is the responsibility of the application to ensure that multiple lock instances with the
   * same rank are never acquired in the same thread.
   *
   * @param <E> The Enum type representing the explicit lock ordering.
   * @since 13.0
   */
  public static final class WithExplicitOrdering<E extends Enum<E>>

 * address, the two URLs identify different resources.
 *
 * ### Port
 *
 * The port used to connect to the web server. By default this is 80 for HTTP and 443 for HTTPS.
 * This class never returns -1 for the port: if no port is explicitly specified in the URL then the
 * scheme's default is used.
 *
 * ### Path
 *

      if (request.isHttps && cacheResponse.handshake == null) {
        return CacheStrategy(request, null)
      }

      // If this response shouldn't have been stored, it should never be used as a response source.
      // This check should be redundant as long as the persistence store is well-behaved and the
      // rules are constant.
      if (!isCacheable(cacheResponse, request)) {

{* ../../docs_src/openapi_callbacks/tutorial001.py hl[16:18,21:22,28:32] *}

There are 2 main differences from a normal *path operation*:

* It doesn't need to have any actual code, because your app will never call this code. It's only used to document the *external API*. So, the function could just have `pass`.

    service.startAsync().awaitRunning();
    enterRun.await();
    service.stopAsync().awaitTerminated();
  }

  public void testTimeout() {
    // Create a service whose executor will never run its commands
    Service service =
        new AbstractExecutionThreadService() {
          @Override
          protected void run() throws Exception {}

          @Override

 * simplifies use of single-valued fields whose values routinely contain commas, such as cookies or
 * dates.
 *
 * This class trims whitespace from values. It never returns values with leading or trailing
 * whitespace.
 *
 * Instances of this class are immutable. Use [Builder] to create instances.
 */
@Suppress("NAME_SHADOWING")
class Headers internal constructor(