return new Strings();
  }

  @Override
  public Collection<String> create(Object... elements) {
    String[] array = new String[elements.length];
    int i = 0;
    for (Object e : elements) {
      array[i++] = (String) e;
    }
    return create(array);
  }

  protected abstract Collection<String> create(String[] elements);

  @Override
  public String[] createArray(int length) {

    public static final String REGEXP_IGNORE_CASE = "regexpIgnoreCase:";

    public static final String CONTAINS = "contains:";

    protected static final String COLLECTIONS = "collections";

    protected static final String COLLECTION = "collection";

    protected static final String GLOBALPARAMS = "globalparams";

    protected static final String START_URLS = "start_urls";

  AbstractSortedKeySortedSetMultimap(SortedMap<K, Collection<V>> map) {
    super(map);
  }

  @Override
  public SortedMap<K, Collection<V>> asMap() {
    return (SortedMap<K, Collection<V>>) super.asMap();
  }

  @Override
  SortedMap<K, Collection<V>> backingMap() {
    return (SortedMap<K, Collection<V>>) super.backingMap();
  }

  @Override
  public SortedSet<K> keySet() {

  public final <C extends Collection<? super E>> C copyInto(C collection) {
    checkNotNull(collection);
    Iterable<E> iterable = getDelegate();
    if (iterable instanceof Collection) {
      collection.addAll((Collection<E>) iterable);
    } else {
      for (E item : iterable) {
        collection.add(item);
      }
    }
    return collection;
  }

  /**

        not(not -> not.setId_Term(id), opLambda);
    }

    public void setId_Terms(Collection<String> idList) {
        setId_Terms(idList, null);
    }

    public void setId_Terms(Collection<String> idList, ConditionOptionCall<IdsQueryBuilder> opLambda) {
        IdsQueryBuilder builder = regIdsQ(idList);
        if (opLambda != null) {

  public void testEquals_smallerMap() {
    Collection<Entry<K, V>> fewerEntries = getSampleEntries(getNumEntries() - 1);
    assertFalse(
        "Maps of different sizes should not be equal.", getMap().equals(newHashMap(fewerEntries)));
  }

  public void testEquals_largerMap() {
    Collection<Entry<K, V>> moreEntries = getSampleEntries(getNumEntries() + 1);
    assertFalse(

import com.google.common.collect.testing.SampleElements.Unhashables;
import java.util.Collection;
import java.util.List;

/**
 * Creates collections containing unhashable sample elements, to be tested.
 *
 * @author Regina O'Dell
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class TestUnhashableCollectionGenerator<T extends Collection<UnhashableObject>>
    implements TestCollectionGenerator<UnhashableObject> {

import static java.util.Collections.emptyList;
import static java.util.Collections.singletonList;
import static java.util.Collections.unmodifiableList;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.collect.testing.IteratorTester;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import java.util.Collection;

public final class Collections2FilterArrayListTest
    extends AbstractFilteredCollectionTest<Collection<Integer>> {
  @Override
  Collection<Integer> createUnfiltered(Iterable<Integer> contents) {
    return Lists.newArrayList(contents);
  }

  @Override
  Collection<Integer> filter(Collection<Integer> elements, Predicate<? super Integer> predicate) {

  @J2ktIncompatible
  static class SerializedForm implements Serializable {
    final ImmutableCollection<?> collection;

    SerializedForm(ImmutableCollection<?> collection) {
      this.collection = collection;
    }

    Object readResolve() {
      return collection.asList();
    }

    private static final long serialVersionUID = 0;
  }

  @GwtIncompatible // serialization