return Lists.newArrayList(contents);
  }

  @Override
  Collection<Integer> filter(Collection<Integer> elements, Predicate<? super Integer> predicate) {
    return Collections2.filter(elements, predicate);
  }

 */

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;
import com.google.common.base.Predicate;
import java.util.Map.Entry;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * Implementation of {@link Multimaps#filterKeys(SetMultimap, Predicate)}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible

      SetMultimap<K, V> filterFiltered(
          FilteredSetMultimap<K, V> multimap, Predicate<? super Entry<K, V>> entryPredicate) {
    Predicate<Entry<K, V>> predicate = Predicates.and(multimap.entryPredicate(), entryPredicate);
    return new FilteredEntrySetMultimap<>(multimap.unfiltered(), predicate);
  }

  static boolean equalsImpl(Multimap<?, ?> multimap, @Nullable Object object) {
    if (object == multimap) {

          assertTrue(collection.removeIf(Predicate.isEqual(samples.e0())));
          iterator.next();
        });
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(ZERO)
  public void testRemoveIf_unsupportedEmptyCollection() {
    try {
      assertFalse(
          "removeIf(Predicate) should return false or throw UnsupportedOperationException",

                    multimap.put("bar", 32);
                    multimap.put("foo", 16);
                    return filterKeys(multimap, not(Predicates.in(ImmutableSet.of("foo", "bar"))));
                  }
                })
            .named("Multimaps.filterKeys[SetMultimap, Predicate]")
            .withFeatures(
                CollectionSize.ANY,
                MultimapFeature.VALUE_COLLECTIONS_SUPPORT_ITERATOR_REMOVE,

 */
@NullUnmarked
public final class FilteredCollectionsTestUtil {
  private static final Predicate<Integer> EVEN =
      new Predicate<Integer>() {
        @Override
        public boolean apply(Integer input) {
          return input % 2 == 0;
        }
      };

  private static final Predicate<Integer> PRIME_DIGIT = Predicates.in(ImmutableSet.of(2, 3, 5, 7));

import static com.google.common.collect.Multimaps.filterValues;
import static java.util.Arrays.asList;

import com.google.common.annotations.GwtIncompatible;
import com.google.common.base.Predicate;
import java.util.Map.Entry;
import java.util.Objects;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit tests for {@link Multimaps} filtering methods.
 *

 */

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;
import com.google.common.base.Predicate;
import java.util.List;
import org.jspecify.annotations.Nullable;

/**
 * Implementation of {@link Multimaps#filterKeys(ListMultimap, Predicate)}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible

 */

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;
import com.google.common.base.Predicate;
import java.util.Map.Entry;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * Implementation of {@link Multimaps#filterKeys(SetMultimap, Predicate)}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible

import static com.google.common.base.Predicates.and;
import static com.google.common.base.Predicates.in;
import static com.google.common.base.Predicates.not;
import static com.google.common.collect.Maps.valuePredicateOnEntries;

import com.google.common.annotations.GwtCompatible;
import com.google.common.base.Predicate;
import com.google.j2objc.annotations.Weak;
import java.util.AbstractCollection;