if !ok {
		return qs
	}
	for arn := range brs.Stats {
		qs.TgtXferStats[arn] = make(map[RMetricName]XferStats)
	}
	count := 0
	var totPeak float64
	// calculate large, small transfers and total transfer rates per replication target at bucket level
	for arn, v := range brs.Stats {
		lcurrTgt := v.XferRateLrg.curr()
		scurrTgt := v.XferRateSml.curr()

	if err != nil {
		return cfg, err
	}
	if replicationMaxLWorkers <= 0 || replicationMaxLWorkers > 10 {
		return cfg, config.ErrInvalidReplicationWorkersValue(nil).Msg("Number of replication workers for transfers >=128MiB should be between 1 and 10 per node")
	}

	cfg.ReplicationMaxLWorkers = replicationMaxLWorkers

3. This `yield from` tells the function to iterate over that thing named `file_like`. And then, for each part iterated, yield that part as coming from this generator function (`iterfile`).

    So, it is a generator function that transfers the "generating" work to something else internally.

    By doing it this way, we can put it in a `with` block, and that way, ensure that the file-like object is closed after finishing.

/// tip

    List<String> transform = transform(listIteratorOnlyList, SOME_FUNCTION);
    assertTrue(elementsEqual(transform, transform(randomAccessList, SOME_FUNCTION)));
  }

  private static class ListIterationOnlyList<E> extends ForwardingList<E> {
    private final List<E> realDelegate;

    private ListIterationOnlyList(List<E> realDelegate) {
      this.realDelegate = realDelegate;
    }

    @Override

    List<String> transform = transform(listIteratorOnlyList, SOME_FUNCTION);
    assertTrue(elementsEqual(transform, transform(randomAccessList, SOME_FUNCTION)));
  }

  private static class ListIterationOnlyList<E> extends ForwardingList<E> {
    private final List<E> realDelegate;

    private ListIterationOnlyList(List<E> realDelegate) {
      this.realDelegate = realDelegate;
    }

    @Override

 * transforms it by invoking {@code toString()} on each element, and returns the first 10 elements
 * as a {@code List}:
 *
 * <pre>{@code
 * ImmutableList<String> results =
 *     FluentIterable.from(database.getClientList())
 *         .filter(Client::isActiveInLastMonth)
 *         .transform(Object::toString)
 *         .limit(10)
 *         .toList();
 * }</pre>

    }

    /**
     * Check that transfer listeners are properly removed after getArtifact and putArtifact
     */
    @Test
    void testWagonTransferListenerRemovedAfterGetArtifactAndPutArtifact() throws Exception {
        Artifact artifact = createTestArtifact("target/test-data/transfer-listener", "jar");
        ArtifactRepository repo = createStringRepo();

  }

  public void testTransform_absent() {
    assertEquals(Optional.absent(), Optional.absent().transform(Functions.identity()));
    assertEquals(Optional.absent(), Optional.absent().transform(Functions.toStringFunction()));
  }

  public void testTransform_presentIdentity() {
    assertEquals(Optional.of("a"), Optional.of("a").transform(Functions.identity()));
  }

  public void testTransform_presentToString() {

 *
 * <pre>{@code
 * ListenableFuture<Boolean> adminIsLoggedIn =
 *     FluentFuture.from(usersDatabase.getAdminUser())
 *         .transform(User::getId, directExecutor())
 *         .transform(ActivityService::isLoggedIn, threadPool)
 *         .catching(RpcException.class, e -> false, directExecutor());
 * }</pre>
 *
 * <h3>Alternatives</h3>
 *
 * <h4>Frameworks</h4>
 *

    POSITIVE_INTEGER_CANDIDATES = intValues.build();
    NEGATIVE_INTEGER_CANDIDATES =
        ImmutableList.copyOf(
            Iterables.concat(
                Iterables.transform(POSITIVE_INTEGER_CANDIDATES, NEGATE_INT),
                ImmutableList.of(Integer.MIN_VALUE)));
    NONZERO_INTEGER_CANDIDATES =
        ImmutableList.copyOf(