### Handling authentication ([.kt][AuthenticateKotlin], [.java][AuthenticateJava])

OkHttp can automatically retry unauthenticated requests. When a response is `401 Not Authorized`, an `Authenticator` is asked to supply credentials. Implementations should build a new request that includes the missing credentials. If no credentials are available, return null to skip the retry.

		// are technically zero-byte files, must not have any associated file
		// data. We previously tried failing here if f.CompressedSize64 != 0,
		// but it turns out that a number of implementations (namely, the Java
		// jar tool) don't properly set the storage method on directories
		// resulting in a file with compressed size > 0 but uncompressed size ==

    return new ByteSource() {
      @Override
      public InputStream openStream() throws IOException {
        return decodingStream(encodedSource.openStream());
      }
    };
  }

  // Implementations for encoding/decoding

  abstract int maxEncodedSize(int bytes);

  abstract void encodeTo(Appendable target, byte[] bytes, int off, int len) throws IOException;

  abstract int maxDecodedSize(int chars);

   * (that is, identical to {@link java.util.Arrays Arrays}{@code
   * .toString(Iterables.toArray(iterable))}). Note that for <i>most</i> implementations of {@link
   * Collection}, {@code collection.toString()} also gives the same result, but that behavior is not
   * generally guaranteed.
   */
  public static String toString(Iterable<?> iterable) {

      }
    }
    return true;
  }

  /**
   * Checks all the properties that should always hold of a map. Also calls {@link
   * #assertMoreInvariants} to check invariants that are peculiar to specific implementations.
   *
   * @see #assertMoreInvariants
   * @param map the map to check.
   */
  protected final void assertInvariants(Map<K, V> map) {
    Set<K> keySet = map.keySet();

      with `UpdateEmbeddingCallback` the behavior of the layer would be same as
      `keras.layers.Embedding`.
*  `keras.optimizers.Adam`
    * Added the option to set adaptive epsilon to match implementations with Jax
      and PyTorch equivalents.

## Thanks to our Contributors

This release contains contributions from many people at Google, as well as:

		p.errorf("expected g or R0 through R15; found %s", name)
		return 0
	}
	return uint16(reg)
}

// Note: There are two changes in the expression handling here
// compared to the old yacc/C implementations. Neither has
// much practical consequence because the expressions we
// see in assembly code are simple, but for the record:
//
// 1) Evaluation uses uint64; the old one used int64.

        // it can be accessed by configuration processors.
        //
        cliRequest.request.setEventSpyDispatcher(eventSpyDispatcher);

        //
        // We expect at most 2 implementations to be available. The SettingsXmlConfigurationProcessor implementation
        // is always available in the core and likely always will be, but we may have another ConfigurationProcessor

    String exceptionFile = noSuchFileException.getFile();
    if (exceptionFile == null) {
      /*
       * It's not clear whether this happens in practice, especially with the filesystem
       * implementations that are built into java.nio.
       */
      return null;
    }
    Path parentPath = getParentPath(path);
    if (parentPath == null) {
      /*
       * This is probably impossible:
       *

    String exceptionFile = noSuchFileException.getFile();
    if (exceptionFile == null) {
      /*
       * It's not clear whether this happens in practice, especially with the filesystem
       * implementations that are built into java.nio.
       */
      return null;
    }
    Path parentPath = getParentPath(path);
    if (parentPath == null) {
      /*
       * This is probably impossible:
       *