*
 * <ol>
 *   <li>A pipeline starts at its leaf step (or steps), which is created from either a callable
 *       block or a {@link ListenableFuture}.
 *   <li>Each other step is derived from one or more input steps. At each step, zero or more objects
 *       can be captured for later closing.
 *   <li>There is one last step (the root of the tree), from which you can extract the final result

    assertSame(key, notification.getKey());
    assertSame(value, notification.getValue());
    assertSame(cause, notification.getCause());
  }

  // Segment core tests

  public void testNewEntry() {
    for (CacheBuilder<Object, Object> builder : allEntryTypeMakers()) {
      LocalCache<Object, Object> map = makeLocalCache(builder);

      Object keyOne = new Object();

    assertSame(key, notification.getKey());
    assertSame(value, notification.getValue());
    assertSame(cause, notification.getCause());
  }

  // Segment core tests

  public void testNewEntry() {
    for (CacheBuilder<Object, Object> builder : allEntryTypeMakers()) {
      LocalCache<Object, Object> map = makeLocalCache(builder);

      Object keyOne = new Object();

   * the first appearance of each key in {@code keys}.
   *
   * <p>When there are multiple instances of a key in {@code keys}, it is unspecified whether {@code
   * valueFunction} will be applied to more than one instance of that key and, if it is, which
   * result will be mapped to that key in the returned map.
   *
   * <p>If {@code keys} is a {@link Set}, a live view can be obtained instead of a copy using {@link