return (unit == null) ? null : unit.toNanos(duration);
  }

  /** Base class for parsing integers. */
  private abstract static class IntegerParser implements ValueParser {
    abstract void parseInteger(CacheBuilderSpec spec, int value);

    @Override
    public void parse(CacheBuilderSpec spec, String key, @Nullable String value) {
      if (isNullOrEmpty(value)) {

    return (unit == null) ? null : unit.toNanos(duration);
  }

  /** Base class for parsing integers. */
  private abstract static class IntegerParser implements ValueParser {
    abstract void parseInteger(CacheBuilderSpec spec, int value);

    @Override
    public void parse(CacheBuilderSpec spec, String key, @Nullable String value) {
      if (isNullOrEmpty(value)) {

  }

  private abstract static class RawTypeConsistencyTester<T extends Enum<T> & CharSequence> {
    abstract T returningT();

    abstract void acceptT(T t);

    abstract <X extends T> X returningX();

    abstract <X> void acceptX(X x);

    abstract <T2 extends Enum<T2> & CharSequence> T2 returningT2();

import org.jspecify.annotations.Nullable;

/**
 * An abstract {@code ScheduledExecutorService} that allows subclasses to {@linkplain
 * #wrapTask(Callable) wrap} tasks before they are submitted to the underlying executor.
 *
 * <p>Note that task wrapping may occur even if the task is never executed.
 *
 * @author Luke Sandberg
 */
@J2ktIncompatible
@GwtIncompatible

 *
 * @param <T> the type of {@link ProfileActivator} being tested
 */
@Deprecated
public abstract class AbstractProfileActivatorTest<T extends ProfileActivator> {

    protected T activator;

    @BeforeEach
    abstract void setUp() throws Exception;

    @AfterEach
    void tearDown() throws Exception {
        activator = null;
    }

import org.jspecify.annotations.Nullable;

/**
 * Generates a dummy interface proxy that simply returns a dummy value for each method.
 *
 * @author Ben Yu
 */
@GwtIncompatible
@J2ktIncompatible
@NullMarked
abstract class DummyProxy {

  /**
   * Returns a new proxy for {@code interfaceType}. Proxies of the same interface are equal to each
   * other if the {@link DummyProxy} instance that created the proxies are equal.
   */

 *
 * @author Kurt Alfred Kluever
 * @since 12.0
 */
@J2ktIncompatible
@GwtIncompatible
public abstract class ForwardingDeque<E extends @Nullable Object> extends ForwardingQueue<E>
    implements Deque<E> {

  /** Constructor for use by subclasses. */
  protected ForwardingDeque() {}

  @Override
  protected abstract Deque<E> delegate();

  @Override
  public void addFirst(@ParametricNullness E e) {

import org.gradle.util.GradleVersion
import java.io.File
import javax.inject.Inject


abstract class CachesCleaner : BuildService<CachesCleaner.Params> {
    interface Params : BuildServiceParameters {
        val gradleVersion: Property<String>
        val homeDir: DirectoryProperty
    }

    @get:Inject
    abstract val fileSystemOperations: FileSystemOperations

    private
    var hasCleaned = false

import org.dbflute.util.DfCollectionUtil;
import org.opensearch.action.delete.DeleteRequestBuilder;
import org.opensearch.action.index.IndexRequestBuilder;

/**
 * @author ESFlute (using FreeGen)
 */
public abstract class EsAbstractEntity implements Entity, Serializable, Cloneable {

    // ===================================================================================

import org.dbflute.util.DfCollectionUtil;
import org.opensearch.action.delete.DeleteRequestBuilder;
import org.opensearch.action.index.IndexRequestBuilder;

/**
 * @author ESFlute (using FreeGen)
 */
public abstract class EsAbstractEntity implements Entity, Serializable, Cloneable {

    // ===================================================================================