* index. This constructor is optimized so that it starts at either the head or the tail,
     * depending on which is closer to the specified index. This allows adds to the tail to be done
     * in constant time.
     *
     * @throws IndexOutOfBoundsException if index is invalid
     */
    ValueForKeyIterator(@ParametricNullness K key, int index) {

  interface WeakValueReference<K, V, E extends InternalEntry<K, V, E>> {
    /**
     * Returns the current value being referenced, or {@code null} if there is none (e.g. because
     * either it got collected, or {@link #clear} was called, or it wasn't set in the first place).
     */
    @Nullable V get();

            if (!temp.exists()) {
                throw new ResourceDoesNotExistException("Downloaded file does not exist: " + temp);
            }

            // The temporary file is named destination + ".tmp" and is done this way to ensure
            // that the temporary file is in the same file system as the destination because the
            // File.renameTo operation doesn't really work across file systems.

    //
    // 9) Execute AbstractLifecycleParticipant.afterProjectsRead(session)
    //
    // 10) Create ProjectDependencyGraph without trimming (as trimming was done in 7). A new topological sort is
    // required after the execution of 9) as the AbstractLifecycleParticipants are free to mutate the MavenProject

			w.Header().Set(xhttp.AmzRequestHostID, globalLocalNodeNameHex)
		}
		h.ServeHTTP(w, r)
	})
}

// criticalErrorHandler handles panics and fatal errors by
// `panic(logger.ErrCritical)` as done by `logger.CriticalIf`.
//
// It should be always the first / highest HTTP handler.
func setCriticalErrorHandler(h http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

// Returns nil if the bytes are invalid or empty.
// AppendTo() can append a serialized Checksum to another already-serialized Checksum,
// however, in practice, we only use one at a time.
// ChecksumFromBytes only returns the first one and no part checksums.
func ChecksumFromBytes(b []byte) *Checksum {
	if len(b) == 0 {
		return nil
	}

	// Read checksum type
	t, n := binary.Uvarint(b)
	if n <= 0 {

                        if ((previousRange != null) && (currentRange != null)) {
                            // TODO shouldn't need to double up on this work, only done for simplicity of handling
                            // recommended
                            // version but the restriction is identical
                            VersionRange newRange = previousRange.restrict(currentRange);

				t.Fatalf("Lifecycle validation failed - %v", err)
			}
			rules := tc.lc.FilterRules(tc.opts)
			if tc.hasRules && len(rules) == 0 {
				t.Fatalf("%d: Expected at least one rule to match but none matched", i+1)
			}
			if !tc.hasRules && len(rules) > 0 {
				t.Fatalf("%d: Expected no rules to match but got matches %v", i+1, rules)
			}
		})
	}
}

        // Move the received data to the read buffer to the reader can read it. If this source has
        // been closed since this read began we must discard the incoming data and tell the
        // connection we've done so.
        withLock {
          if (closed) {
            receiveBuffer.clear()
          } else {
            val wasEmpty = readBuffer.size == 0L
            readBuffer.writeAll(receiveBuffer)

    /*
     * Wait not just until the Future's value is set (as in future.get()) but
     * also until ListeningScheduledExecutorService's wrapper task is done
     * executing listeners, as detected by yielding control to afterExecute.
     */
    completed.await();
    assertTrue(future.isDone());
    assertThat(future.get()).isEqualTo(42);