}

    @Override
    public Kerb5Authenticator clone() {
        Kerb5Authenticator auth = new Kerb5Authenticator(getSubject());
        cloneInternal(auth, this);
        return auth;
    }

    /**
     * Clone the context
     *
     * @param to the target authenticator
     * @param from the source authenticator
     */

	public final fun clearHeaders ()Lmockwebserver3/MockResponse$Builder;
	public synthetic fun clone ()Ljava/lang/Object;
	public fun clone ()Lmockwebserver3/MockResponse$Builder;
	public final fun code (I)Lmockwebserver3/MockResponse$Builder;
	public final fun doNotReadRequestBody ()Lmockwebserver3/MockResponse$Builder;

        assertTrue(ex.getMessage().contains("Refreshing credentials is not supported"));
    }

    @Test
    @DisplayName("clone: copies all relevant fields")
    void clone_copiesFields() {
        Subject subj = new Subject();
        Kerb5Authenticator auth = new Kerb5Authenticator(subj, "DOM", "user", "pass");
        auth.setUser("alice");

        if (key == null || sessionId == null) {
            throw new IllegalArgumentException("Session ID and key must not be null");
        }

        // Clone the key to prevent external modification
        byte[] keyClone = key.clone();
        SecretKey secretKey = new SecretKeySpec(keyClone, algorithm);

        // Store in memory
        sessionKeys.put(sessionId, secretKey);

The process for contributing to any of the [Elastic repositories](https://github.com/elastic/) is similar. Details for individual projects can be found below.

### Fork and clone the repository

You will need to fork the main Elasticsearch code or documentation repository and clone it to your local machine. See
[github help page](https://help.github.com/articles/fork-a-repo) for help.

Further instructions for specific projects are given below.

// to operate on list of key values.
type KVS []KV

// Empty - return if kv is empty
func (kvs KVS) Empty() bool {
	return len(kvs) == 0
}

// Clone - returns a copy of the KVS
func (kvs KVS) Clone() KVS {
	return append(make(KVS, 0, len(kvs)), kvs...)
}

// GetWithDefault - returns default value if key not set
func (kvs KVS) GetWithDefault(key string, defaultKVS KVS) string {

			return
		}

		tt := madmin.TraceInternal
		if strings.HasPrefix(tc.FuncName, "s3.") {
			tt = madmin.TraceS3
		}

		// Calculate input body size with headers
		reqHeaders := r.Header.Clone()
		reqHeaders.Set("Host", r.Host)
		if len(r.TransferEncoding) == 0 {
			reqHeaders.Set("Content-Length", strconv.Itoa(int(r.ContentLength)))
		} else {

- **Java 21 features** - Switch expressions and pattern matching for reduced overhead

## 🧪 Building and Testing

### Development Setup
```bash
# Clone the repository
git clone https://github.com/codelibs/corelib.git
cd corelib

# Compile the project
mvn clean compile

# Run all tests
mvn test

# Run specific test class
mvn test -Dtest=BeanUtilTest

	export MC_HOST_minio="http://minio:minio123@127.0.0.1:${start_port}/"
	unset MINIO_KMS_AUTO_ENCRYPTION # do not auto-encrypt objects
	export MINIO_CI_CD=1

	MC_BUILD_DIR="mc-$RANDOM"
	if ! git clone --quiet https://github.com/minio/mc "$MC_BUILD_DIR"; then
		echo "failed to download https://github.com/minio/mc"
		purge "${MC_BUILD_DIR}"
		exit 1
	fi

	(cd "${MC_BUILD_DIR}" && go build -o "$WORK_DIR/mc")

    }

    @Test
    void testClone() {
        // Test clone() method
        HMACT64 originalHmac = new HMACT64(TEST_KEY);
        originalHmac.engineUpdate(TEST_DATA, 0, TEST_DATA.length / 2);

        HMACT64 clonedHmac = (HMACT64) originalHmac.clone();

        assertNotNull(clonedHmac);
        assertNotSame(originalHmac, clonedHmac);