format.mayOnlyBe(FormatPAX)
	}
	for k, v := range paxHdrs {
		if !validPAXRecord(k, v) {
			return FormatUnknown, nil, headerError{fmt.Sprintf("invalid PAX record: %q", k+" = "+v)}
		}
	}

	// TODO(dsnet): Re-enable this when adding sparse support.
	// See https://golang.org/issue/22735
	/*
		// Check sparse files.
		if len(h.SparseHoles) > 0 || h.Typeflag == TypeGNUSparse {
			if isHeaderOnlyType(h.Typeflag) {

 * {@link ClosingFuture} pipeline.
 */
@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public abstract class AbstractClosingFutureTest extends TestCase {
  // TODO(dpb): Use Expect once that supports JUnit 3, or we can use JUnit 4.
  final List<AssertionError> failures = new ArrayList<>();
  final StandardSubjectBuilder expect =
      StandardSubjectBuilder.forCustomFailureStrategy(

   * @throws NoSuchElementException if the iterable is empty
   */
  @ParametricNullness
  public static <T extends @Nullable Object> T getLast(Iterable<T> iterable) {
    // TODO(kevinb): Support a concurrently modified collection?
    if (iterable instanceof List) {
      List<T> list = (List<T>) iterable;
      if (list.isEmpty()) {
        throw new NoSuchElementException();
      }

  reset_tf_configure_bazelrc()

  cleanup_makefile()
  setup_python(environ_cp)

  if is_windows():
    environ_cp['TF_NEED_OPENCL'] = '0'
    environ_cp['TF_CUDA_CLANG'] = '0'
    # TODO(ibiryukov): Investigate using clang as a cpu or cuda compiler on
    # Windows.
    environ_cp['TF_DOWNLOAD_CLANG'] = '0'
    environ_cp['TF_NEED_MPI'] = '0'

  if is_ppc64le():

   *
   * @throws NullPointerException if {@code elements} contains a null element
   */
  public static <E> ImmutableList<E> copyOf(Iterable<? extends E> elements) {
    checkNotNull(elements); // TODO(kevinb): is this here only for GWT?
    return (elements instanceof Collection)
        ? copyOf((Collection<? extends E>) elements)
        : copyOf(elements.iterator());
  }

  /**

        mergeModelBase(target, source, sourceDominant, context);
        // TODO
    }

    protected void mergeActivation(
            Activation target, Activation source, boolean sourceDominant, Map<Object, Object> context) {
        // TODO
    }

    protected Object getDependencyKey(Dependency dependency) {
        return dependency;
    }

    assertEquals(6, queue.size());
    assertEquals(8, queue.capacity());
    assertEquals(42, queue.maximumSize);
    assertThat(queue.comparator()).isEqualTo(SOME_COMPARATOR);
  }

  // TODO: tests that check the weird interplay between expected size,
  // maximum size, size of initial contents, default capacity...

  private static void checkNatural(MinMaxPriorityQueue<Integer> queue) {

   */
  @SuppressWarnings("unchecked") // could probably be avoided with a forwarding Spliterator
  @SafeVarargs
  public static <T extends @Nullable Object> Stream<T> concat(Stream<? extends T>... streams) {
    // TODO(lowasser): consider an implementation that can support SUBSIZED
    boolean isParallel = false;
    int characteristics = Spliterator.ORDERED | Spliterator.SIZED | Spliterator.NONNULL;
    long estimatedSize = 0L;

 *
 * @author Louis Wasserman
 * @since 12.0
 */
@GwtIncompatible // hasn't been tested yet
public abstract class ImmutableSortedMultiset<E> extends ImmutableMultiset<E>
    implements SortedMultiset<E> {
  // TODO(lowasser): GWT compatibility

  /**
   * Returns a {@code Collector} that accumulates the input elements into a new {@code
   * ImmutableMultiset}. Elements are sorted by the specified comparator.
   *

	if validMeta.Deleted {
		// notFoundPartsErrs is ignored since
		// - delete marker does not have any parts
		dataBlocks := (len(errs) + 1) / 2
		return validMeta, notFoundMetaErrs > dataBlocks
	}

	// TODO: It is possible to replay the object via just single
	// xl.meta file, considering quorum number of data-dirs are still
	// present on other drives.
	//
	// However this requires a bit of a rewrite, leave this up for