}
  }

  public <T> void testRejectTypeVariable_withOwnerType() {
    // Neither has subclass
    assertHasTypeVariable(new From<Integer>().new To<String>().type());
    assertHasTypeVariable(new From<T>().new To<String>().type());
    assertHasTypeVariable(new From<Integer>().new To<T>().type());

    // Owner is subclassed
    assertHasTypeVariable(new From<Integer>() {}.new To<String>().type());

    }
  }

  public <T> void testRejectTypeVariable_withOwnerType() {
    // Neither has subclass
    assertHasTypeVariable(new From<Integer>().new To<String>().type());
    assertHasTypeVariable(new From<T>().new To<String>().type());
    assertHasTypeVariable(new From<Integer>().new To<T>().type());

    // Owner is subclassed
    assertHasTypeVariable(new From<Integer>() {}.new To<String>().type());

    return (Segment<K, V, E, S>[]) new Segment<?, ?, ?, ?>[ssize];
  }

  // Inner Classes

  /**
   * Segments are specialized versions of hash tables. This subclass inherits from ReentrantLock
   * opportunistically, just to simplify some locking and avoid separate construction.
   */
  @SuppressWarnings("serial") // This class is never serialized.
  abstract static class Segment<

import java.util.concurrent.atomic.AtomicReference;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;
import org.mockito.Mockito;

/**
 * Tests for {@link ClosingFuture}. Subclasses exercise either the {@link
 * ClosingFuture#finishToFuture()} or {@link
 * ClosingFuture#finishToValueAndCloser(ValueAndCloserConsumer, Executor)} paths to complete a
 * {@link ClosingFuture} pipeline.
 */
@NullUnmarked

   * {@link #copyInto} and forget the {@code SetView} itself.
   *
   * @since 2.0
   */
  public abstract static class SetView<E extends @Nullable Object> extends AbstractSet<E> {
    private SetView() {} // no subclasses but our own

    /**
     * Returns an immutable copy of the current contents of this set view. Does not support null
     * elements.
     *

    return predicate instanceof CharMatcher ? (CharMatcher) predicate : new ForPredicate(predicate);
  }

  // Constructors

  /**
   * Constructor for use by subclasses. When subclassing, you may want to override {@code
   * toString()} to provide a useful description.
   */
  protected CharMatcher() {}

  // Abstract methods

      Iterator<? extends T> iterator) {
    if (iterator instanceof PeekingImpl) {
      // Safe to cast <? extends T> to <T> because PeekingImpl only uses T
      // covariantly (and cannot be subclassed to add non-covariant uses).
      @SuppressWarnings("unchecked")
      PeekingImpl<T> peeking = (PeekingImpl<T>) iterator;
      return peeking;
    }
    return new PeekingImpl<>(iterator);
  }

_2019-02-05_

 *  Fix: Don't crash when using a custom `X509TrustManager` or `SSLSocket` on Android. When we
    removed obsolete code for Android 4.4 we inadvertently also removed support for custom
    subclasses. We've restored that support!


## Version 3.13.0

_2019-02-04_

 *  **This release bumps our minimum requirements to Java 8+ or Android 5+.** Cutting off old