* call to {@code shutdown} or {@code shutdownNow} may result in concurrent calls to {@code
   * invokeAll/invokeAny} throwing RejectedExecutionException, although a subset of the tasks may
   * already have been executed.
   *
   * @since 32.0.0 (taking the place of a method with a different return type from 15.0)
   */
  public static ListeningScheduledExecutorService sameThreadScheduledExecutor() {

                          (N predecessor) -> EndpointPair.ordered(predecessor, node)),
                      Iterators.transform(
                          // filter out 'node' from successors (already covered by predecessors,
                          // above)
                          Sets.difference(graph.successors(node), ImmutableSet.of(node)).iterator(),

        if ((flags & SmbConstants.O_CREAT) == SmbConstants.O_CREAT) {
            // create it if necessary
            if ((flags & SmbConstants.O_EXCL) == SmbConstants.O_EXCL) {
                // fail if already exists
                this.openFunction = OPEN_FN_CREATE | OPEN_FN_FAIL_IF_EXISTS;
            } else {
                this.openFunction = OPEN_FN_CREATE | OPEN_FN_OPEN;
            }
        } else {

 * requirement that existing callers already fulfill).
 *
 * Disclaimer: Part of the reason that callers are so well adapted to `Function<A, B>` may be that
 * that is how the signature looked even prior to this comment! So naturally any change can break
 * existing users, but it can't *fix* existing users because any users who needed
 * `Function<@Nullable A, @Nullable B>` already had to find a workaround. Still, there is a *ton* of

        .post("This is the original message".toRequestBody())
        .addHeader("Content-Encoding", "deflate")
        .gzip()
        .build()
    }.also {
      assertThat(it).hasMessage("Content-Encoding already set: deflate")
    }
  }

  @Test
  fun cannotGzipTwice() {
    assertFailsWith<IllegalStateException> {
      Request
        .Builder()
        .url("https://square.com/")

import java.util.RandomAccess;
import java.util.Spliterator;
import java.util.Spliterators;
import org.jspecify.annotations.Nullable;

/**
 * Static utility methods pertaining to {@code int} primitives, that are not already found in either
 * {@link Integer} or {@link Arrays}.
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/PrimitivesExplained">primitive utilities</a>.
 *

   * Returns an immutable array containing all the values from {@code stream}, in order.
   *
   * @since 33.4.0 (but since 22.0 in the JRE flavor)
   */
  @IgnoreJRERequirement // Users will use this only if they're already using streams.
  public static ImmutableLongArray copyOf(LongStream stream) {
    // Note this uses very different growth behavior from copyOf(Iterable) and the builder.
    long[] array = stream.toArray();

    return Longs.constrainToRange(timeoutNanos, 0L, (Long.MAX_VALUE / 4) * 3);
  }

  /**
   * Returns System.nanoTime() unless the timeout has already elapsed. Returns 0L if and only if the
   * timeout has already elapsed.
   */
  private static long initNanoTime(long timeoutNanos) {
    if (timeoutNanos <= 0L) {
      return 0L;
    } else {
      long startTime = System.nanoTime();

          if (isShutdown) return

          // If the stream ID is less than the last created ID, assume it's already closed.
          if (streamId <= lastGoodStreamId) return

          // If the stream ID is in the client's namespace, assume it's already closed.
          if (streamId % 2 == nextStreamId % 2) return

          // Create a stream.
          val headers = headerBlock.toHeaders()

     */
    public Object get(final String key) {
        return params.get(key);
    }

    /**
     * Retrieves a parameter value as a String.
     * If the stored value is already a String, it is returned directly.
     * Otherwise, the toString() method is called on the value.
     *
     * @param key the parameter key to look up