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();

    abstract <T2 extends CharSequence & Iterable<T2>> void acceptT2(T2 t2);

    static void verifyConsistentRawType() {

import com.google.common.base.Preconditions;
import java.io.File;
import java.io.FilenameFilter;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;

/**
 * File name filter that only accepts files matching a regular expression. This class is thread-safe
 * and immutable.
 *
 * @author Apple Chow
 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault

  public void testAccept() {
    File dir = new File("foo");
    FilenameFilter filter = new PatternFilenameFilter("a+");
    assertTrue(filter.accept(dir, "a"));
    assertTrue(filter.accept(dir, "aaaa"));
    assertFalse(filter.accept(dir, "b"));

    // Show that dir is ignored
    assertTrue(filter.accept(null, "a"));
  }

  public void testNulls() throws Exception {
    NullPointerTester tester = new NullPointerTester();

 * for interprocess communication.
 *
 * <h2>Receiving Events</h2>
 *
 * <p>To receive events, an object should:
 *
 * <ol>
 *   <li>Expose a public method, known as the <i>event subscriber</i>, which accepts a single
 *       argument of the type of event desired;
 *   <li>Mark it with a {@link Subscribe} annotation;
 *   <li>Pass itself to an EventBus instance's {@link #register(Object)} method.
 * </ol>
 *

            final RequestProcessor processor = new RequestProcessor(encoding, threshold);
            processor.accept(con);
            try (final CurlResponse res = processor.getResponse()) {
                actionListener.accept(res);
            } catch (final IOException e) {
                exceptionListener.accept(e);
            }
        }, exceptionListener);
    }

    public CurlResponse execute() {

  /** The HTTP {@code Accept} header field name. */
  public static final String ACCEPT = "Accept";
  /** The HTTP {@code Accept-Charset} header field name. */
  public static final String ACCEPT_CHARSET = "Accept-Charset";
  /** The HTTP {@code Accept-Encoding} header field name. */
  public static final String ACCEPT_ENCODING = "Accept-Encoding";
  /** The HTTP {@code Accept-Language} header field name. */

        public void connect(Consumer<HttpURLConnection> actionListener, Consumer<Exception> exceptionListener) {
            try {
                actionListener.accept(new MockHttpURLConnection(new URL(url)));
            } catch (MalformedURLException e) {
                exceptionListener.accept(e);
            }
        }
    }

    class MockHttpURLConnection extends HttpURLConnection {

        MockHttpURLConnection(URL u) {

      @Override
      public boolean tryAdvance(Consumer<? super T> action) {
        return delegate.tryAdvance((IntConsumer) i -> action.accept(function.apply(i)));
      }

      @Override
      public void forEachRemaining(Consumer<? super T> action) {
        delegate.forEachRemaining((IntConsumer) i -> action.accept(function.apply(i)));
      }

      @Override
      @CheckForNull
      public Spliterator<T> trySplit() {

        }
    }

    public void addFunctionScore(final Consumer<List<FilterFunctionBuilder>> functionScoreQuery) {
        final List<FilterFunctionBuilder> list = new ArrayList<>();
        functionScoreQuery.accept(list);
        queryBuilder = QueryBuilders.functionScoreQuery(queryBuilder, list.toArray(new FilterFunctionBuilder[list.size()]));
    }

    public void addQuery(final Consumer<BoolQueryBuilder> boolQuery) {

 * full queue, the queue automatically removes its head element. This is different from conventional
 * bounded queues, which either block or reject new elements when full.
 *
 * <p>This class is not thread-safe, and does not accept null elements.
 *
 * @author Kurt Alfred Kluever
 * @since 15.0
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public final class EvictingQueue<E> extends ForwardingQueue<E> implements Serializable {