if err := b.UnreadByte(); err == nil {
		t.Fatal("UnreadByte after ReadByte at EOF: got no error")
	}

	// check not at EOF
	b.WriteString("abcdefghijklmnopqrstuvwxyz")

	// after unsuccessful read
	if n, err := b.Read(nil); n != 0 || err != nil {
		t.Fatalf("Read(nil) = %d,%v; want 0,nil", n, err)
	}
	if err := b.UnreadByte(); err == nil {
		t.Fatal("UnreadByte after Read(nil): got no error")
	}

 *       </ul>
 * </ul>
 *
 * <p>As such, the CycleDetectingLockFactory may not be suitable for performance-critical
 * applications which involve tightly-looped or deeply-nested locking algorithms.
 *
 * @author Darick Tong
 * @since 13.0
 */
@J2ktIncompatible
@GwtIncompatible
public class CycleDetectingLockFactory {

  /**

        long allocatedBeforeCleanup = bufferManager.getTotalAllocated();

        // Cleanup should not throw exception
        assertDoesNotThrow(() -> bufferManager.cleanup());

        // After cleanup, all regions should be released (but the count may not match exactly
        // if some regions were pooled rather than immediately released)

 */

package com.google.common.escape;

import com.google.common.testing.AbstractPackageSanityTests;
import org.jspecify.annotations.NullUnmarked;

/**
 * Basic sanity tests for the entire package.
 *
 * @author Ben Yu
 */

@NullUnmarked

 */

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;

/**
 * Unused stub class, unreferenced under Java and manually emulated under GWT.
 *
 * @author Chris Povirk
 */
@GwtCompatible
abstract class ForwardingImmutableMap<K, V> {
  private ForwardingImmutableMap() {}

 * limitations under the License.
 */

package com.google.common.util.concurrent;

import org.jspecify.annotations.NullUnmarked;

/**
 * Tests for {@link Monitor}'s interruptible methods.
 *
 * @author Justin T. Sampson
 */
@NullUnmarked
public class InterruptibleMonitorTest extends MonitorTestCase {

  public InterruptibleMonitorTest() {
    super(true);
  }

 */

package com.google.common;

/**
 * A dummy class so that the Maven Javadoc plugin will produce a jar. If it doesn't produce a jar,
 * then the Sonatype repository manager issues an error.
 *
 * @author Chris Povirk
 */

 */

package com.google.common.escape;

import com.google.common.testing.AbstractPackageSanityTests;
import org.jspecify.annotations.NullUnmarked;

/**
 * Basic sanity tests for the entire package.
 *
 * @author Ben Yu
 */

@NullUnmarked

 * limitations under the License.
 */

package com.google.common.util.concurrent;

import org.jspecify.annotations.NullUnmarked;

/**
 * Tests for {@link Monitor}'s interruptible methods.
 *
 * @author Justin T. Sampson
 */
@NullUnmarked
public class InterruptibleMonitorTest extends MonitorTestCase {

  public InterruptibleMonitorTest() {
    super(true);
  }

 * limitations under the License.
 */

package com.google.common.util.concurrent;

import org.jspecify.annotations.NullUnmarked;

/**
 * Tests for {@link Monitor}'s uninterruptible methods.
 *
 * @author Justin T. Sampson
 */
@NullUnmarked
public class UninterruptibleMonitorTest extends MonitorTestCase {

  public UninterruptibleMonitorTest() {
    super(false);
  }