* exception.
   *
   * <p>When the underlying delegate throws an exception then this memoizing supplier will keep
   * delegating calls until it returns valid data.
   *
   * @param duration the length of time after a value is created that it should stop being returned
   *     by subsequent {@code get()} calls

public final class Sources {

    private Sources() {}

    /**
     * Creates a new source for the specified path.
     *
     * @param path the path to the file
     * @return a new Source instance
     * @throws NullPointerException if path is null
     */
    @Nonnull
    public static Source fromPath(@Nonnull Path path) {
        return new PathSource(requireNonNull(path, "path"));
    }

    /**

import okhttp3.Response;

public final class CurrentDateHeader {
  private final OkHttpClient client = new OkHttpClient.Builder()
      .addInterceptor(new CurrentDateInterceptor())
      .build();

  public void run() throws Exception {
    Request request = new Request.Builder()
        .url("https://publicobject.com/helloworld.txt")
        .build();

    try (Response response = client.newCall(request).execute()) {

      }
    }
  }

  @Throws(UnknownHostException::class)
  private fun throwBestFailure(
    hostname: String,
    failures: List<Exception>,
  ): List<InetAddress> {
    if (failures.isEmpty()) {
      throw UnknownHostException(hostname)
    }

    val failure = failures[0]

    if (failure is UnknownHostException) {
      throw failure
    }

  public void testEmptyInputs_mixedAlgorithms() throws Exception {
    String knownOutput = "8cbf764cbe2e4623d99a41354adfd390";

    Mac mac = Mac.getInstance("HmacMD5");
    mac.init(SHA1_KEY);
    assertEquals(knownOutput, HashCode.fromBytes(mac.doFinal()).toString());
    assertEquals(knownOutput, Hashing.hmacMd5(SHA1_KEY).newHasher().hash().toString());
  }

  public void testKnownInputs() throws Exception {

     * @param bufferIndex starting index in source buffer
     * @param len length of data to read
     * @return number of bytes read
     * @throws SMBProtocolDecodingException if decoding fails
     */
    protected abstract int readParametersWireFormat(byte[] buffer, int bufferIndex, int len) throws SMBProtocolDecodingException;

    /**
     * Reads data from wire format
     * @param buffer source buffer

     * @return initialized Mac instance
     * @throws GeneralSecurityException if Mac cannot be created
     */
    private Mac createMacInstance() throws GeneralSecurityException {
        if (this.closed) {
            throw new IllegalStateException("SigningDigest is closed");
        }
        if (this.signingKey == null) {
            throw new IllegalStateException("Signing key has been wiped");
        }

   *     invocation conversion.
   * @throws InvocationTargetException if the underlying method or constructor throws an exception.
   */
  // All subclasses are owned by us and we'll make sure to get the R type right, including nullness.
  @SuppressWarnings({"unchecked", "nullness"})
  @CanIgnoreReturnValue
  public final @Nullable R invoke(@Nullable T receiver, @Nullable Object... args)

        else -> type
      }

  companion object {
    @Throws(IOException::class)
    @JvmStatic
    @JvmName("get")
    fun SSLSession.handshake(): Handshake {
      val cipherSuite =
        when (val cipherSuiteString = checkNotNull(cipherSuite) { "cipherSuite == null" }) {
          "TLS_NULL_WITH_NULL_NULL", "SSL_NULL_WITH_NULL_NULL" -> {
            throw IOException("cipherSuite == $cipherSuiteString")
          }

        .build();

    try (Response response = client.newCall(request).execute()) {
      if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

      System.out.println(response.body().string());
    }
  }

  public static void main(String... args) throws Exception {
    new PostString().run();
  }