* this is subject to change. Also, {@code junit4.TearDownTestCase} will.
   *
   * @throws Exception for any reason. {@code TearDownTestCase} ensures that any exception thrown
   *     will not interfere with other TearDown operations.
   */
  void tearDown() throws Exception;

This lock guards internal state of each connection. This lock is never held for blocking operations. That means that we acquire the lock, read or write a few fields and release the lock. No I/O and no application-layer callbacks.

#### Http2Stream

    /** Number of threads to use for thumbnail generation. */
    protected int numOfThreads = 1;

    /** Flag indicating whether to perform cleanup operations. */
    protected boolean cleanup = false;

    /**
     * Default constructor for the GenerateThumbnailJob.
     */
    public GenerateThumbnailJob() {
        super();
    }

    /**

 * ContiguousSet.closed(5, 42)
 * }
 *
 * <p><b>Warning:</b> Be extremely careful what you do with conceptually large instances (such as
 * {@code ContiguousSet.create(Range.greaterThan(0), DiscreteDomain.integers()}). Certain operations
 * on such a set can be performed efficiently, but others (such as {@link Set#hashCode} or {@link
 * Collections#frequency}) can cause major performance problems.
 *
 * @author Gregory Kick
 * @since 10.0
 */

        auth.secureWipePassword();
        assertNull(auth.getPassword());
    }

    /**
     * Test that closed authenticator prevents all sensitive operations
     */
    @Test
    @DisplayName("Test closed authenticator blocks all sensitive operations")
    public void testClosedAuthenticatorBlocking() throws Exception {
        NtlmPasswordAuthenticator auth = new NtlmPasswordAuthenticator("DOMAIN", "user", "BlockedPass123!");

import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;
import org.junit.Ignore;

/**
 * A generic JUnit test which tests {@code get} operations on a map. Can't be invoked directly;
 * please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
 *
 * @author Kevin Bourrillion
 * @author Chris Povirk
 */
@GwtCompatible

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.CIFSException;

/**
 * Unified exception class for SMB operations providing enhanced error handling,
 * retry policies, and contextual information.
 *
 * This exception consolidates the various SMB exception types and provides:
 * - Standardized error codes
 * - Automatic retry policies

    public static final int SMB2_GLOBAL_CAP_DFS = 0x1;

    /**
     * Server supports leasing
     */
    public static final int SMB2_GLOBAL_CAP_LEASING = 0x2;

    /**
     * Server supports multi-credit operations
     */
    public static final int SMB2_GLOBAL_CAP_LARGE_MTU = 0x4;

    /**
     * Server supports multi-channel connections
     */
    public static final int SMB2_GLOBAL_CAP_MULTI_CHANNEL = 0x8;

import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.util.SMBUtil;
import jcifs.util.Hexdump;

/**
 * Represents the FILE_BASIC_INFORMATION structure used in SMB2/3 file system control code (FSCC) operations.
 * This structure contains basic file information including creation time, last access time, last write time,
 * change time, and file attributes for querying and setting file metadata.
 */

import java.util.Map.Entry;
import java.util.concurrent.ConcurrentMap;
import org.jspecify.annotations.NullMarked;
import org.junit.Ignore;

/**
 * A generic JUnit test which tests {@code putIfAbsent} operations on a concurrent map. Can't be
 * invoked directly; please see {@link
 * com.google.common.collect.testing.ConcurrentMapTestSuiteBuilder}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible