}
    
    private void flushCachedWrites(String path) {
        // Implementation to flush cached writes
        // This will be called when losing write cache
    }
    
    private void invalidateReadCache(String path) {
        // Implementation to invalidate read cache
        // This will be called when losing read cache
    }
}
```

## 5. Lease Break Handling

### 5.1 Lease Break Notification

 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *

import java.io.Writer;
import java.nio.charset.Charset;
import java.util.Iterator;
import java.util.stream.Stream;

/**
 * A destination to which characters can be written, such as a text file. Unlike a {@link Writer}, a
 * {@code CharSink} is not an open, stateful stream that can be written to and closed. Instead, it
 * is an immutable <i>supplier</i> of {@code Writer} instances.
 *
 * <p>{@code CharSink} provides two kinds of methods:
 *

)

var (
	errSFTPPublicKeyBadFormat = errors.New("the public key provided could not be parsed")
	errSFTPUserHasNoPolicies  = errors.New("no policies present on this account")
	errSFTPLDAPNotEnabled     = errors.New("ldap authentication is not enabled")
)

// if the sftp parameter --trusted-user-ca-key is set, then
// the final form of the key file will be set as this variable.
var globalSFTPTrustedCAPubkey ssh.PublicKey

        this.client = Objects.requireNonNull(client, "client must not be null");
        suggestSettings = Objects.requireNonNull(settings, "settings must not be null");
        this.readingConverter = Objects.requireNonNull(readingConverter, "readingConverter must not be null");
        this.contentsReadingConverter = Objects.requireNonNull(contentsReadingConverter, "contentsReadingConverter must not be null");

# under the License.
#

#
# Maven user properties
#
# The properties defined in this file will be made available through
# user properties at the very beginning of Maven's boot process.
#

# Comma-separated list of files to include.
# Each item may be enclosed in quotes to gracefully include spaces. Items are trimmed before being loaded.

StandardError=journal

# When a JVM receives a SIGTERM signal it exits with code 143
SuccessExitStatus=143

# Specifies the maximum file descriptor number that can be opened by this process
LimitNOFILE=${packaging.os.max.open.files}

# Specifies the maximum number of bytes of memory that may be locked into RAM
# Set to "infinity" if you use the 'bootstrap.mlockall: true' option
# in fess.yml and 'MAX_LOCKED_MEMORY=unlimited' in ${packaging.env.file}

 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *

        assertEquals(expectedToString, exception.toString(), "toString output should match the expected format");
    }

    /**
     * Test that NbtException can be caught as a CIFSException.
     */
    @Test
    @DisplayName("NbtException should be catchable as CIFSException")
    void testCatchableAsCIFSException() {
        try {
            throw new NbtException(NbtException.ERR_NAM_SRVC, NbtException.FMT_ERR);

        long arrayDuration = System.nanoTime() - arrayStartTime;

        // Set-based lookup should be significantly faster
        // Note: This is a rough check - exact performance depends on JVM, hardware, etc.
        // We expect Set lookup to be at least as fast as array lookup for large datasets
        assertTrue("Set-based lookup should be faster or comparable to array-based lookup for large datasets",