public void testFrequency_multiset() {
    Multiset<String> multiset = ImmutableMultiset.of("a", "b", "a", "c", "b", "a");
    assertEquals(3, frequency(multiset, "a"));
    assertEquals(2, frequency(multiset, "b"));
    assertEquals(1, frequency(multiset, "c"));
    assertEquals(0, frequency(multiset, "d"));
    assertEquals(0, frequency(multiset, 4.2));
    assertEquals(0, frequency(multiset, null));
  }

 * return {@code SortedSet}.
 *
 * @author Louis Wasserman
 */
@GwtIncompatible
interface SortedMultisetBridge<E extends @Nullable Object> extends Multiset<E> {
  @Override
  SortedSet<E> elementSet();

import com.google.common.collect.ImmutableTable;
import com.google.common.collect.ListMultimap;
import com.google.common.collect.MapDifference;
import com.google.common.collect.Multimap;
import com.google.common.collect.Multiset;
import com.google.common.collect.PeekingIterator;
import com.google.common.collect.Range;
import com.google.common.collect.RowSortedTable;
import com.google.common.collect.SetMultimap;

   * {@code keys().count(k) == get(k).size()} for all {@code k}.
   *
   * <p>Changes to the returned multiset will update the underlying multimap, and vice versa.
   * However, <i>adding</i> to the returned collection is not possible.
   */
  Multiset<K> keys();

  /**
   * Returns a view collection containing the <i>value</i> from each key-value pair contained in

import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.testing.features.CollectionFeature;
import java.util.Collections;
import org.junit.Ignore;

/**
 * Tests for {@code Multiset.add}.
 *
 * @author Jared Levy
 */
@GwtCompatible
@Ignore("test runners must not instantiate and run this directly, only via suites we build")

  public Collection<V> get(@ParametricNullness K key) {
    return delegate().get(key);
  }

  @Override
  public boolean isEmpty() {
    return delegate().isEmpty();
  }

  @Override
  public Multiset<K> keys() {
    return delegate().keys();
  }

  @Override
  public Set<K> keySet() {
    return delegate().keySet();
  }

  @CanIgnoreReturnValue
  @Override

  public Collection<V> get(@ParametricNullness K key) {
    return delegate().get(key);
  }

  @Override
  public boolean isEmpty() {
    return delegate().isEmpty();
  }

  @Override
  public Multiset<K> keys() {
    return delegate().keys();
  }

  @Override
  public Set<K> keySet() {
    return delegate().keySet();
  }

  @CanIgnoreReturnValue
  @Override

 *
 * <p><b>Note:</b> If your values are always positive and less than 2^31, you may wish to use a
 * {@link com.google.common.collect.Multiset} such as {@link
 * com.google.common.collect.ConcurrentHashMultiset} instead.
 *
 * <p><b>Warning:</b> Unlike {@code Multiset}, entries whose values are zero are not automatically
 * removed from the map. Instead they must be removed manually with {@link #removeAllZeros}.
 *

import com.google.common.collect.LinkedHashMultiset;
import com.google.common.collect.ListMultimap;
import com.google.common.collect.Maps;
import com.google.common.collect.Multimap;
import com.google.common.collect.Multiset;
import com.google.common.collect.Ordering;
import com.google.common.collect.Range;
import com.google.common.collect.RowSortedTable;
import com.google.common.collect.SetMultimap;

    }

    @Override
    public ActionFuture<MultiGetResponse> multiGet(final MultiGetRequest request) {
        return client.multiGet(request);
    }

    @Override
    public void multiGet(final MultiGetRequest request, final ActionListener<MultiGetResponse> listener) {
        client.multiGet(request, listener);
    }

    @Override
    public MultiGetRequestBuilder prepareMultiGet() {