* tests can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} while we
   * figure out what to do with <a href="http://goo.gl/qJBruX">{@code ConcurrentHashMap} support for
   * {@code entrySet().add()}</a>.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getAddAllUnsupportedNonePresentMethod() {

   * tests can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} while we
   * figure out what to do with <a href="http://goo.gl/qJBruX">{@code ConcurrentHashMap} support for
   * {@code entrySet().add()}</a>.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getAddAllUnsupportedNonePresentMethod() {

   *
   * <p><b>Note:</b> this method is now unnecessary and should be treated as deprecated. Instead,
   * use the {@code HashSet} constructor directly, taking advantage of <a
   * href="http://goo.gl/iz2Wi">"diamond" syntax</a>.
   */
  public static <E extends @Nullable Object> HashSet<E> newHashSet() {
    return new HashSet<>();
  }

  /**

   *
   * <p><b>Note:</b> this method is now unnecessary and should be treated as deprecated. Instead,
   * use the {@code ArrayList} {@linkplain ArrayList#ArrayList() constructor} directly, taking
   * advantage of <a href="http://goo.gl/iz2Wi">"diamond" syntax</a>.
   */
  @GwtCompatible(serializable = true)
  public static <E extends @Nullable Object> ArrayList<E> newArrayList() {
    return new ArrayList<>();
  }

  /**

   * can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} while we figure out
   * what to do with <a href="http://goo.gl/qJBruX">{@code ConcurrentHashMap} support for {@code
   * entrySet().add()}</a>.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getAddUnsupportedNotPresentMethod() {

   * can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} while we figure out
   * what to do with <a href="http://goo.gl/qJBruX">{@code ConcurrentHashMap} support for {@code
   * entrySet().add()}</a>.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getAddUnsupportedNotPresentMethod() {

   *     RuntimeException(e)}. But consider whether users would be better off if your API threw a
   *     different type of exception. For background on the deprecation, read <a
   *     href="https://goo.gl/Ivn2kc">Why we deprecated {@code Throwables.propagate}</a>.
   */
  @CanIgnoreReturnValue
  @J2ktIncompatible
  @GwtIncompatible
  @Deprecated
  public static RuntimeException propagate(Throwable throwable) {

   *     RuntimeException(e)}. But consider whether users would be better off if your API threw a
   *     different type of exception. For background on the deprecation, read <a
   *     href="https://goo.gl/Ivn2kc">Why we deprecated {@code Throwables.propagate}</a>.
   */
  @CanIgnoreReturnValue
  @J2ktIncompatible
  @GwtIncompatible
  @Deprecated
  public static RuntimeException propagate(Throwable throwable) {

  public static final String X_FORWARDED_PROTO = "X-Forwarded-Proto";
  /**
   * The HTTP <a href="http://goo.gl/lQirAH">{@code X-Forwarded-Host}</a> header field name.
   *
   * @since 20.0
   */
  public static final String X_FORWARDED_HOST = "X-Forwarded-Host";
  /**
   * The HTTP <a href="http://goo.gl/YtV2at">{@code X-Forwarded-Port}</a> header field name.
   *
   * @since 20.0
   */

   *
   * <p><b>Note:</b> this method is now unnecessary and should be treated as deprecated. Instead,
   * use the {@code HashMap} constructor directly, taking advantage of <a
   * href="http://goo.gl/iz2Wi">"diamond" syntax</a>.
   *
   * @return a new, empty {@code HashMap}
   */
  public static <K extends @Nullable Object, V extends @Nullable Object>
      HashMap<K, V> newHashMap() {
    return new HashMap<>();