new EqualsTester()
        .addEqualityGroup(Hashing.concatenating(asList(Hashing.md5())))
        .addEqualityGroup(Hashing.concatenating(asList(Hashing.murmur3_32())))
        .addEqualityGroup(
            Hashing.concatenating(Hashing.md5(), Hashing.md5()),
            Hashing.concatenating(asList(Hashing.md5(), Hashing.md5())))
        .addEqualityGroup(
            Hashing.concatenating(Hashing.murmur3_32(), Hashing.md5()),

    new EqualsTester()
        .addEqualityGroup(Hashing.concatenating(asList(Hashing.md5())))
        .addEqualityGroup(Hashing.concatenating(asList(Hashing.murmur3_32())))
        .addEqualityGroup(
            Hashing.concatenating(Hashing.md5(), Hashing.md5()),
            Hashing.concatenating(asList(Hashing.md5(), Hashing.md5())))
        .addEqualityGroup(
            Hashing.concatenating(Hashing.murmur3_32(), Hashing.md5()),

  /**
   * 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

     * 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

	}
	return result, nil
}

// 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"

t  = float64(x*y); r = t + z
</pre>

<h4 id="String_concatenation">String concatenation</h4>

<p>
Strings can be concatenated using the <code>+</code> operator
or the <code>+=</code> assignment operator:
</p>

<pre>
s := "hi" + string(c)
s += " and good bye"
</pre>

<p>
String addition creates a new string by concatenating the operands.
</p>

t  = float64(x*y); r = t + z
</pre>

<h4 id="String_concatenation">String concatenation</h4>

<p>
Strings can be concatenated using the <code>+</code> operator
or the <code>+=</code> assignment operator:
</p>

<pre>
s := "hi" + string(c)
s += " and good bye"
</pre>

<p>
String addition creates a new string by concatenating the operands.
</p>

    }


    /**
     * This is the same as {@link jcifs.util.Hexdump#toHexString(int val, int
     * size)} but provides a more practical form when trying to avoid {@link
     * java.lang.String} concatenation and {@link java.lang.StringBuffer}.
     * 
     * @param val
     * @param dst
     * @param dstIndex
     * @param size
     */
    public static void toHexChars ( int val, char dst[], int dstIndex, int size ) {

    }

/** 
 * This is the same as {@link jcifs.smb1.util.Hexdump#toHexString(int val, int
 * size)} but provides a more practical form when trying to avoid {@link
 * java.lang.String} concatenation and {@link java.lang.StringBuffer}.
 */ 
    public static void toHexChars( int val, char dst[], int dstIndex, int size ) {
        while( size > 0 ) {
            int i = dstIndex + size - 1;