On Windows, [Current] now returns the process owner user when
the current thread is impersonating another user. Previously,

 * {@linkplain #submit enqueued} callable will not be submitted to its associated executor until the
 * previous callable has returned -- and, if the previous callable was an {@link AsyncCallable}, not
 * until the {@code Future} it returned is {@linkplain Future#isDone done} (successful, failed, or
 * cancelled).
 *
 * <p>This class serializes execution of <i>submitted</i> tasks but not any <i>listeners</i> of

// 1. __online__             - has the latest copy of xl.meta - returned by listOnlineDisks
//
// 2. __offline__            - err == errDiskNotFound
//
// 3. __availableWithParts__ - has the latest copy of xl.meta and has all
//                             parts with checksums matching; returned by disksWithAllParts
//
// 4. __outdated__           - returned by outDatedDisk, provided []StorageAPI

       *
       * Maybe there is a way to avoid this cycle. But we think the cycle is safe enough to ignore:
       * Each task is retained for only as long as it is running -- so it's retained only as long as
       * it would already be retained by the underlying executor.
       *
       * If the cycle test starts reporting this cycle in the future, we should add an entry to
       * cycle_suppress_list.txt.

type BatchJobRetry struct {
	line, col int
	Attempts  int           `yaml:"attempts" json:"attempts"` // number of retry attempts
	Delay     time.Duration `yaml:"delay" json:"delay"`       // delay between each retries
}

var _ yaml.Unmarshaler = &BatchJobRetry{}

// UnmarshalYAML - BatchJobRetry extends unmarshal to extract line, column information
func (r *BatchJobRetry) UnmarshalYAML(val *yaml.Node) error {

   * The returned collection is a live view of {@code fromCollection}; changes to one affect the
   * other.
   *
   * <p>The returned collection's {@code add()} and {@code addAll()} methods throw an {@link
   * UnsupportedOperationException}. All other collection methods are supported, as long as {@code
   * fromCollection} supports them.
   *

	// in a subsequent request.
	NextPartNumberMarker int

	// Maximum number of parts that were allowed in the response.
	MaxParts int

	// Indicates whether the returned list of parts is truncated.
	IsTruncated bool

	// List of all parts.
	Parts []PartInfo

	// Any metadata set during InitMultipartUpload, including encryption headers.
	UserDefined map[string]string

| Maximum number of parts returned per list parts request                         | 10000                                                                           |
| Maximum number of objects returned per list objects request                     | 1000                                                                            |

// The returned string is heap-allocated, and caller should call free() on it.
TF_CAPI_EXPORT extern const char* TF_GraphDebugString(TF_Graph* graph,
                                                      size_t* len);

// Returns the function content in a human-readable format, with length set in
// `len`. The format is subject to change in the future.

   */
  @Override
  <T extends @Nullable Object> ListenableFuture<T> submit(
      Runnable task, @ParametricNullness T result);

  /**
   * {@inheritDoc}
   *
   * <p>All elements in the returned list must be {@link ListenableFuture} instances. The easiest
   * way to obtain a {@code List<ListenableFuture<T>>} from this method is an unchecked (but safe)
   * cast:
   *
   * <pre>