assertNotNull(deserialized.get("list"), "List should not be null");
        assertNotNull(deserialized.get("nestedMap"), "Nested map should not be null");
    }

    /**
     * Helper class for testing that unregistered custom classes are rejected.
     */
    private static class CustomTestClass {
        @SuppressWarnings("unused")
        private final String value;

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.helper;

import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.mail.send.supplement.SMailPostingDiscloser;

    checkNotNull(valueComparator);
    return Comparator.<Optional<T>, @Nullable T>comparing(
        o -> orElseNull(o), Comparator.nullsLast(valueComparator));
  }

  @IgnoreJRERequirement // helper for emptiesFirst+emptiesLast
  /*
   * If we make these calls inline inside the lambda inside emptiesFirst()/emptiesLast(), we get an
   * Animal Sniffer error, despite the @IgnoreJRERequirement annotation there. For details, see

import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import jcifs.CIFSContext;
import jcifs.CIFSException;
import jcifs.SidResolver;
import jcifs.dcerpc.rpc;

class SIDTest {

    // Helper to build a minimal sid_t
    private static rpc.sid_t buildSidT(byte revision, byte[] identAuth, int... subs) {
        rpc.sid_t s = new rpc.sid_t();
        s.revision = revision;

type DeadlineWorker struct {
	timeout time.Duration
}

// NewDeadlineWorker constructs a new DeadlineWorker with the given timeout.
// To return values, use the WithDeadline helper instead.
func NewDeadlineWorker(timeout time.Duration) *DeadlineWorker {
	dw := &DeadlineWorker{
		timeout: timeout,
	}
	return dw
}

 *     dependencies = getProject().configurations.compile
 *   }
 * </pre>
 * <p>
 * Every jar must have a {@code .sha1} file in the licenses dir. These can be managed
 * automatically using the {@code updateShas} helper task that is created along
 * with this task. It will add {@code .sha1} files for new jars that are in dependencies
 * and remove old {@code .sha1} files that are no longer needed.
 * <p>

            return entity;
        });
    }

    // ===================================================================================
    //                                                                        Small Helper
    //                                                                        ============

    /**
     * Validates group attributes using LDAP manager.
     *
     * @param attributes the attributes to validate

import java.util.TreeSet;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ConcurrentSkipListMap;
import org.jspecify.annotations.NullUnmarked;

/**
 * Helper classes for various benchmarks.
 *
 * @author Christopher Swenson
 */
@NullUnmarked
final class BenchmarkHelpers {
  /** So far, this is the best way to test various implementations of {@link Set} subclasses. */

import java.util.concurrent.TimeoutException;
import junit.framework.AssertionFailedError;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * A helper for concurrency testing. One or more {@code TestThread} instances are instantiated in a
 * test with reference to the same "lock-like object", and then their interactions with that object

import org.opensearch.action.admin.indices.create.CreateIndexResponse;
import org.opensearch.transport.client.Client;

/**
 * Test class for refactoring changes made to Suggester class.
 *
 * Tests cover:
 * - Index alias helper method (getIndicesForAlias)
 * - Edge cases for switchIndex with EXPECTED_INDEX_COUNT
 * - Index lifecycle with refactored methods
 */
public class SuggesterRefactoringTest {
    static OpenSearchRunner runner;