throw new ExecutionException(e);
    } catch (Error e) {
      statsCounter.recordLoadException(ticker.read() - startTime);
      throw new ExecutionError(e);
    }

    if (calculatedValue == null) {
      String message = loader + " returned null for key " + key + ".";
      throw new CacheLoader.InvalidCacheLoadException(message);
    }

   * If this {@link EndpointPair} {@link #isOrdered()}, returns the node which is the source.
   *
   * @throws UnsupportedOperationException if this {@link EndpointPair} is not ordered
   */
  public abstract N source();

  /**
   * If this {@link EndpointPair} {@link #isOrdered()}, returns the node which is the target.
   *
   * @throws UnsupportedOperationException if this {@link EndpointPair} is not ordered
   */
  public abstract N target();

   *
   * @param addr the raw IP address in little-endian byte order
   * @return an InetAddress object created from the raw IP address
   * @throws UnknownHostException if IP address is of illegal length
   */
  public static InetAddress fromLittleEndianByteArray(byte[] addr) throws UnknownHostException {
    byte[] reversed = new byte[addr.length];
    for (int i = 0; i < addr.length; i++) {

  public void testOnlyOneOpen() throws Exception {
    String testString = "abcdefgh";
    CharSource source = newCharSource(testString);
    int[] counter = new int[1];
    CharSource reader =
        new CharSource() {
          @Override
          public Reader openStream() throws IOException {
            if (counter[0]++ != 0) {
              throw new IllegalStateException("More than one source open");

   *     no change will be made.
   * @return the count of the element before the operation; possibly zero
   * @throws IllegalArgumentException if {@code occurrences} is negative, or if this operation would
   *     result in more than {@link Integer#MAX_VALUE} occurrences of the element
   * @throws NullPointerException if {@code element} is null and this implementation does not permit

    public boolean isOptional() {
        return optional;
    }

    @Override
    public ArtifactVersion getSelectedVersion() throws OverConstrainedVersionException {
        return versionRange.getSelectedVersion(this);
    }

    @Override
    public boolean isSelectedVersionKnown() throws OverConstrainedVersionException {
        return versionRange.isSelectedVersionKnown(this);
    }

    @Override

    if (key == null) {
      throw new NullPointerException("null key in entry: null=" + value);
    } else if (value == null) {
      throw new NullPointerException("null value in entry: " + key + "=null");
    }
  }

  @CanIgnoreReturnValue
  static int checkNonnegative(int value, String name) {
    if (value < 0) {
      throw new IllegalArgumentException(name + " cannot be negative but was: " + value);

    super(checkNotNull(out));
    this.hasher = checkNotNull(hashFunction.newHasher());
  }

  @Override
  public void write(int b) throws IOException {
    hasher.putByte((byte) b);
    out.write(b);
  }

  @Override
  public void write(byte[] bytes, int off, int len) throws IOException {
    hasher.putBytes(bytes, off, len);
    out.write(bytes, off, len);
  }

  /**

     * @return the validated string
     * @throws PACDecodingException if validation fails
     */
    public String check(final String string) throws PACDecodingException {
        if (this.pointer == 0 && string != null) {
            throw new PACDecodingException("Non-empty string");
        }

        final int expected = this.length / 2;
        if (string.length() != expected) {

   *     Corresponds to `FLAG_FIN`.
   */
  @Throws(IOException::class)
  fun newStream(
    requestHeaders: List<Header>,
    out: Boolean,
  ): Http2Stream = newStream(0, requestHeaders, out)

  @Throws(IOException::class)
  private fun newStream(
    associatedStreamId: Int,
    requestHeaders: List<Header>,
    out: Boolean,