public NavigableMap<K, V> descendingMap() {
      return filterEntries(unfiltered.descendingMap(), entryPredicate);
    }

    @Override
    public NavigableMap<K, V> subMap(
        @ParametricNullness K fromKey,
        boolean fromInclusive,
        @ParametricNullness K toKey,
        boolean toInclusive) {
      return filterEntries(

import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Implementation of {@link Multimaps#filterEntries(Multimap, Predicate)}.
 *
 * @author Jared Levy
 * @author Louis Wasserman
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
class FilteredEntryMultimap<K extends @Nullable Object, V extends @Nullable Object>

import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Implementation of {@link Multimaps#filterEntries(Multimap, Predicate)}.
 *
 * @author Jared Levy
 * @author Louis Wasserman
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
class FilteredEntryMultimap<K extends @Nullable Object, V extends @Nullable Object>

   * @since 11.0
   */
  public static <K extends @Nullable Object, V extends @Nullable Object>
      Multimap<K, V> filterEntries(
          Multimap<K, V> unfiltered, Predicate<? super Entry<K, V>> entryPredicate) {
    checkNotNull(entryPredicate);
    if (unfiltered instanceof SetMultimap) {
      return filterEntries((SetMultimap<K, V>) unfiltered, entryPredicate);
    }
    return (unfiltered instanceof FilteredMultimap)

                return s.equals("x") || s.equals("y") || s.equals("z");
              }
            }));
    assertEquals(newArrayList("a", "c", "e"), list);
  }

  // The Maps returned by Maps.filterEntries(), Maps.filterKeys(), and
  // Maps.filterValues() are not tested with removeIf() since Maps are not
  // Iterable.  Those returned by Iterators.filter() and Iterables.filter()