* default} methods. Instead, it inherits their default implementations. When those implementations
 * invoke methods, they invoke methods on the {@code ForwardingSetMultimap}.
 *
 * @author Kurt Alfred Kluever
 * @since 3.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class ForwardingSetMultimap<K extends @Nullable Object, V extends @Nullable Object>

 * default} methods. Instead, it inherits their default implementations. When those implementations
 * invoke methods, they invoke methods on the {@code ForwardingSortedSetMultimap}.
 *
 * @author Kurt Alfred Kluever
 * @since 3.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class ForwardingSortedSetMultimap<
        K extends @Nullable Object, V extends @Nullable Object>

import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Static utility methods pertaining to classes in the {@code java.util.concurrent.atomic} package.
 *
 * @author Kurt Alfred Kluever
 * @since 10.0
 */
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public final class Atomics {
  private Atomics() {}

  /**
   * Creates an {@code AtomicReference} instance with no initial value.

import com.google.common.annotations.J2ktIncompatible;
import javax.annotation.CheckForNull;

/**
 * Represents a {@linkplain System#getProperties() standard system property}.
 *
 * @author Kurt Alfred Kluever
 * @since 15.0
 */
@J2ktIncompatible
@GwtIncompatible // java.lang.System#getProperty
@ElementTypesAreNonnullByDefault
public enum StandardSystemProperty {

  /** Java Runtime Environment version. */

import com.google.common.testing.AbstractPackageSanityTests;
import junit.framework.AssertionFailedError;

/**
 * Covers basic sanity checks for the entire package.
 *
 * @author Kurt Alfred Kluever
 */

public class PackageSanityTests extends AbstractPackageSanityTests {

  private static final AbstractGraphBuilder<?> GRAPH_BUILDER_A =
      GraphBuilder.directed().expectedNodeCount(10);

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import junit.framework.TestCase;

/**
 * Tests for the MessageDigestHashFunction.
 *
 * @author Kurt Alfred Kluever
 */
public class MessageDigestHashFunctionTest extends TestCase {
  private static final ImmutableSet<String> INPUTS = ImmutableSet.of("", "Z", "foobar");

import com.google.common.testing.AbstractPackageSanityTests;
import junit.framework.AssertionFailedError;

/**
 * Covers basic sanity checks for the entire package.
 *
 * @author Kurt Alfred Kluever
 */

public class PackageSanityTests extends AbstractPackageSanityTests {

  private static final AbstractGraphBuilder<?> GRAPH_BUILDER_A =
      GraphBuilder.directed().expectedNodeCount(10);

import com.google.common.collect.Lists;
import java.lang.reflect.Field;
import java.util.List;
import junit.framework.TestCase;

/**
 * Tests for the HttpHeaders class.
 *
 * @author Kurt Alfred Kluever
 */
public class HttpHeadersTest extends TestCase {

  public void testConstantNameMatchesString() throws Exception {
    // Special case some of the weird HTTP Header names...

 * default} methods. Instead, it inherits their default implementations. When those implementations
 * invoke methods, they invoke methods on the {@code ForwardingExecutorService}.
 *
 * @author Kurt Alfred Kluever
 * @since 10.0
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public abstract class ForwardingExecutorService extends ForwardingObject
    implements ExecutorService {

import java.util.Queue;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tests for {@link Synchronized#queue} and {@link Queues#synchronizedQueue}.
 *
 * @author Kurt Alfred Kluever
 */
public class SynchronizedQueueTest extends TestCase {

  protected Queue<String> create() {
    TestQueue<String> inner = new TestQueue<>();
    Queue<String> outer = Synchronized.queue(inner, inner.mutex);