* Returns the {@link Method} instance for {@link #testPutAll_nullKeyUnsupported()} so that tests
   * can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
   * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun bug 5045147</a> is fixed.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getPutAllNullKeyUnsupportedMethod() {

import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;
import sun.security.jca.ProviderList;
import sun.security.jca.Providers;

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

              new java.security.PrivilegedExceptionAction<sun.misc.Unsafe>() {
                @Override
                public sun.misc.Unsafe run() throws Exception {
                  Class<sun.misc.Unsafe> k = sun.misc.Unsafe.class;
                  for (java.lang.reflect.Field f : k.getDeclaredFields()) {
                    f.setAccessible(true);
                    Object x = f.get(null);

   * Returns the {@link Method} instance for {@link #testAddAll_nullUnsupported()} so that tests can
   * suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
   * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun bug 5045147</a> is fixed.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getAddAllNullUnsupportedMethod() {

   * Returns the {@link Method} instance for {@link #testCreateWithNull_unsupported()} so that tests
   * can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
   * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun bug 5045147</a> is fixed.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getCreateWithNullUnsupportedMethod() {

   * to remove() will incorrectly throw an IllegalStateException, instead of removing the last
   * element returned.
   *
   * <p>See <a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6529795">Sun bug 6529795</a>
   */
  static class IteratorWithSunJavaBug6529795<T> implements Iterator<T> {
    Iterator<T> iterator;
    boolean nextThrewException;

    }
  }

  /**
   * Returns a sun.misc.Unsafe. Suitable for use in a 3rd party package. Replace with a simple call
   * to Unsafe.getUnsafe when integrating into a jdk.
   *
   * @return a sun.misc.Unsafe
   */
  @SuppressWarnings("removal") // b/318391980
  private static sun.misc.Unsafe getUnsafe() {
    try {
      return sun.misc.Unsafe.getUnsafe();

  }

  /**
   * {@link AtomicHelper} based on {@link sun.misc.Unsafe}.
   *
   * <p>Static initialization of this class will fail if the {@link sun.misc.Unsafe} object cannot
   * be accessed.
   */
  @SuppressWarnings({"sunapi", "removal"}) // b/318391980
  private static final class UnsafeAtomicHelper extends AtomicHelper {
    static final sun.misc.Unsafe UNSAFE;
    static final long LISTENERS_OFFSET;

   * Returns the {@link Method} instance for {@link #testCreateWithNull_unsupported()} so that tests
   * can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
   * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun bug 5045147</a> is fixed.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getCreateWithNullUnsupportedMethod() {

   * of {@link java.util.Collections#checkedCollection(java.util.Collection, Class)} can suppress it
   * with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
   * href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6409434">Sun bug 6409434</a> is fixed.
   * It's unclear whether nulls were to be permitted or forbidden, but presumably the eventual fix