/**
   * Returns a hash function which computes its hash code by concatenating the hash codes of the
   * underlying hash functions together. This can be useful if you need to generate hash codes of a
   * specific length.
   *
   * <p>For example, if you need 1024-bit hash codes, you could join two {@link Hashing#sha512} hash
   * functions together: {@code Hashing.concatenating(Hashing.sha512(), Hashing.sha512())}.
   *
   * @since 19.0

type DummyDataGen struct {
	b           []byte
	idx, length int64
}

// NewDummyDataGen returns a ReadSeeker over the first `totalLength`
// bytes from the infinite stream consisting of repeated
// concatenations of `alphabets`.
//
// The skipOffset (generally = 0) can be used to skip a given number
// of bytes from the beginning of the infinite stream. This is useful
// to compare such streams of bytes that may be split up, because:

     * is the only one in use, but if we encounter nested concatenations, we start a deque of
     * meta-iterators rather than letting the nesting get arbitrarily deep.  This keeps each
     * operation O(1).
     */

    private @Nullable Iterator<? extends Iterator<? extends T>> topMetaIterator;

    // Only becomes nonnull if we encounter nested concatenations.

     * format. It should not contain any other PEM-encoded blocks, but it may contain other text
     * which will be ignored.
     *
     * Encode a held certificate into this format by concatenating the results of
     * [certificatePem()][certificatePem] and [privateKeyPkcs8Pem()][privateKeyPkcs8Pem].
     *
     * [rfc_7468]: https://tools.ietf.org/html/rfc7468
     * [rfc_5208]: https://tools.ietf.org/html/rfc5208

        decorator.
    *   Added a `tf.keras.layers.experimental.preprocessing.HashedCrossing`
        layer which applies the hashing trick to the concatenation of crossed
        scalar inputs. This provides a stateless way to try adding feature
        crosses of integer or string data to a model.
    *   Removed `keras.layers.experimental.preprocessing.CategoryCrossing`.

  }

  /**
   * Evaluates whether the argument is an ISATAP address.
   *
   * <p>From RFC 5214: "ISATAP interface identifiers are constructed in Modified EUI-64 format [...]
   * by concatenating the 24-bit IANA OUI (00-00-5E), the 8-bit hexadecimal value 0xFE, and a 32-bit
   * IPv4 address in network byte order [...]"
   *
   * <p>For more on ISATAP addresses see section 6.1 of <a target="_parent"

	}
	return errors.New(part.Error)
}

// CompleteMultipartUpload - completes an ongoing multipart
// transaction after receiving all the parts indicated by the client.
// Returns an md5sum calculated by concatenating all the individual
// md5sums of all the parts.
//
// Implements S3 compatible Complete multipart API.

  }

  /**
   * Evaluates whether the argument is an ISATAP address.
   *
   * <p>From RFC 5214: "ISATAP interface identifiers are constructed in Modified EUI-64 format [...]
   * by concatenating the 24-bit IANA OUI (00-00-5E), the 8-bit hexadecimal value 0xFE, and a 32-bit
   * IPv4 address in network byte order [...]"
   *
   * <p>For more on ISATAP addresses see section 6.1 of <a target="_parent"

keyLength || int64(numBlocks) > maxBlocks { return nil, errors.New("pbkdf2: keyLength too long") } var buf [4]byte dk := make([]byte, 0, numBlocks*hashLen) U := make([]byte, hashLen) for block := 1; block <= numBlocks; block++ { // N.B.: || means concatenation, ^ means XOR // for each block T_i = U_1 ^ U_2 ^ ... ^ U_iter // U_1 = PRF(password, salt || uint(i)) prf.Reset() prf.Write(salt) buf[0] = byte(block >> 24) buf[1] = byte(block >> 16) buf[2] = byte(block >> 8) buf[3] = byte(block) prf.Write(buf[:4])...

keyLength || int64(numBlocks) > maxBlocks { return nil, errors.New("pbkdf2: keyLength too long") } var buf [4]byte dk := make([]byte, 0, numBlocks*hashLen) U := make([]byte, hashLen) for block := 1; block <= numBlocks; block++ { // N.B.: || means concatenation, ^ means XOR // for each block T_i = U_1 ^ U_2 ^ ... ^ U_iter // U_1 = PRF(password, salt || uint(i)) prf.Reset() prf.Write(salt) buf[0] = byte(block >> 24) buf[1] = byte(block >> 16) buf[2] = byte(block >> 8) buf[3] = byte(block) prf.Write(buf[:4])...