import java.util.Iterator;
import org.jspecify.annotations.Nullable;

/**
 * An iterator that transforms a backing iterator; for internal use. This avoids the object overhead
 * of constructing a {@link com.google.common.base.Function Function} for internal methods.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
abstract class TransformedIterator<F extends @Nullable Object, T extends @Nullable Object>
    implements Iterator<T> {

   *
   * <p><b>{@code Stream} equivalent:</b> {@code Stream.empty()}.
   *
   * @since 20.0
   */
  @SuppressWarnings("EmptyList") // ImmutableList doesn't support nullable element types
  public static <E extends @Nullable Object> FluentIterable<E> of() {
    return FluentIterable.from(Collections.<E>emptyList());
  }

  /**
   * Returns a fluent iterable containing the specified elements in order.
   *

   *
   * <p><b>{@code Stream} equivalent:</b> {@link Stream#empty}.
   *
   * @since 20.0
   */
  @SuppressWarnings("EmptyList") // ImmutableList doesn't support nullable element types
  public static <E extends @Nullable Object> FluentIterable<E> of() {
    return FluentIterable.from(Collections.<E>emptyList());
  }

  /**
   * Returns a fluent iterable containing the specified elements in order.
   *

 * @since 4.0
 */
@J2ktIncompatible
@GwtIncompatible
public final class ThreadFactoryBuilder {
  private @Nullable String nameFormat = null;
  private @Nullable Boolean daemon = null;
  private @Nullable Integer priority = null;
  private @Nullable UncaughtExceptionHandler uncaughtExceptionHandler = null;
  private @Nullable ThreadFactory backingThreadFactory = null;

  /**
   * Creates a new {@link ThreadFactory} builder.
   *

    }

    @Override
    public @Nullable V edgeValueOrDefault(N nodeU, N nodeV, @Nullable V defaultValue) {
      return delegate().edgeValueOrDefault(nodeV, nodeU, defaultValue); // transpose
    }

    @Override
    public @Nullable V edgeValueOrDefault(EndpointPair<N> endpoints, @Nullable V defaultValue) {
      return delegate().edgeValueOrDefault(transpose(endpoints), defaultValue);

    }

    @Override
    public @Nullable V edgeValueOrDefault(N nodeU, N nodeV, @Nullable V defaultValue) {
      return delegate().edgeValueOrDefault(nodeV, nodeU, defaultValue); // transpose
    }

    @Override
    public @Nullable V edgeValueOrDefault(EndpointPair<N> endpoints, @Nullable V defaultValue) {
      return delegate().edgeValueOrDefault(transpose(endpoints), defaultValue);

import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

@GwtCompatible
@NullMarked
abstract class AbstractFilteredMapTest extends TestCase {
  private static final Predicate<@Nullable String> NOT_LENGTH_3 =
      input -> input == null || input.length() != 3;
  private static final Predicate<@Nullable Integer> EVEN = input -> input == null || input % 2 == 0;

import junit.framework.TestCase;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Test cases for {@link Table} read operations.
 *
 * @author Jared Levy
 */
@GwtCompatible
@NullMarked
public abstract class AbstractTableReadTest<C extends @Nullable Character> extends TestCase {
  protected Table<String, Integer, C> table;

  /**

import com.google.common.annotations.J2ktIncompatible;
import java.util.AbstractList;
import java.util.List;
import java.util.ListIterator;
import java.util.RandomAccess;
import org.jspecify.annotations.Nullable;

/**
 * Implementation of {@link Lists#cartesianProduct(List)}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
final class CartesianList<E> extends AbstractList<List<E>> implements RandomAccess {

        .testEquals();
  }

  public void testOfEntriesNull() {
    Entry<@Nullable Integer, @Nullable Integer> nullKey = entry(null, 23);
    assertThrows(
        NullPointerException.class,
        () -> ImmutableMap.ofEntries((Entry<Integer, Integer>) nullKey));
    Entry<@Nullable Integer, @Nullable Integer> nullValue = entry(23, null);
    assertThrows(
        NullPointerException.class,