<T extends @Nullable Object> Predicate<T> withNarrowedType() {
      return (Predicate<T>) this;
    }
  }

  /**
   * @see Predicates#not(Predicate)
   */
  private static final class NotPredicate<T extends @Nullable Object>
      implements Predicate<T>, Serializable {
    final Predicate<T> predicate;

    NotPredicate(Predicate<T> predicate) {
      this.predicate = checkNotNull(predicate);
    }

    checkSerialization(Predicates.and(Arrays.asList(TRUE, FALSE)));
  }

  public void testAnd_arrayDefensivelyCopied() {
    @SuppressWarnings("unchecked") // generic arrays
    Predicate<Object>[] array = (Predicate<Object>[]) new Predicate<?>[] {Predicates.alwaysFalse()};
    Predicate<Object> predicate = Predicates.and(array);
    assertFalse(predicate.apply(1));
    array[0] = Predicates.alwaysTrue();

    checkSerialization(Predicates.and(Arrays.asList(TRUE, FALSE)));
  }

  public void testAnd_arrayDefensivelyCopied() {
    @SuppressWarnings("unchecked") // generic arrays
    Predicate<Object>[] array = (Predicate<Object>[]) new Predicate<?>[] {Predicates.alwaysFalse()};
    Predicate<Object> predicate = Predicates.and(array);
    assertFalse(predicate.apply(1));
    array[0] = Predicates.alwaysTrue();

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import static com.google.common.base.Predicates.equalTo;
import static com.google.common.base.Predicates.not;
import static com.google.common.collect.Maps.immutableEntry;
import static com.google.common.collect.Multimaps.filterKeys;
import static com.google.common.collect.Multimaps.filterValues;

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;

    Predicate<? super Integer> h = Predicates.equalTo(42);
    Function<? super String, Integer> g = new HashCodeFunction();
    Function<Float, String> f = Functions.forMap(m, "F");

    Predicate<Float> p1 = Predicates.compose(Predicates.compose(h, g), f);
    Predicate<Float> p2 = Predicates.compose(h, Functions.compose(g, f));

    // Might be nice (eventually) to have:

 * java.util.function.Predicate java.util.function.Predicate}.
 *
 * <p>The {@link Predicates} class provides common predicates and related utilities.
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/FunctionalExplained">the use of {@code Predicate}</a>.
 *
 * <h3>For Java 8+ users</h3>
 *

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import static com.google.common.base.Predicates.equalTo;
import static com.google.common.base.Predicates.not;
import static com.google.common.collect.Maps.immutableEntry;
import static com.google.common.collect.Multimaps.filterKeys;
import static com.google.common.collect.Multimaps.filterValues;

    Predicate<? super Integer> h = Predicates.equalTo(42);
    Function<? super String, Integer> g = new HashCodeFunction();
    Function<Float, String> f = Functions.forMap(m, "F");

    Predicate<Float> p1 = Predicates.compose(Predicates.compose(h, g), f);
    Predicate<Float> p2 = Predicates.compose(h, Functions.compose(g, f));

    // Might be nice (eventually) to have:

 */
@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));