* safe to do so. The exact circumstances under which a copy will or will not be performed are
   * undocumented and subject to change.
   *
   * <p>This method is not type-safe, as it may be called on elements that are not mutually
   * comparable.
   *
   * @throws ClassCastException if the elements are not mutually comparable
   * @throws NullPointerException if any of {@code elements} is null
   */

// error returned when temporary account is not found
var errNoSuchTempAccount = errors.New("Specified temporary account does not exist")

// error returned when access key is not found
var errNoSuchAccessKey = errors.New("Specified access key does not exist")

// error returned in IAM subsystem when an account doesn't exist.
var errNoSuchAccount = errors.New("Specified account does not exist")

     *
     * @param model The model whose duplicate elements should be merged, must not be {@code null}.
     * @param request The model building request that holds further settings, must not be {@code null}.
     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
     */
    void mergeDuplicates(Model model, ModelBuildingRequest request, ModelProblemCollector problems);

 * }
 *
 * <p>The state-changing methods are not idempotent; it is an error to start or stop a stopwatch
 * that is already in the desired state.
 *
 * <p>When testing code that uses this class, use {@link #createUnstarted(Ticker)} or {@link
 * #createStarted(Ticker)} to supply a fake or mock ticker. This allows you to simulate any valid
 * behavior of the stopwatch.
 *
 * <p><b>Note:</b> This class is not thread-safe.
 *

        assertNotNull(capabilities, "Capabilities should not be null");
        assertEquals(1, capabilities.size(), "TCP provider should only support send/receive");
        assertTrue(capabilities.contains(RdmaCapability.RDMA_SEND_RECEIVE), "Should support send/receive");
        assertFalse(capabilities.contains(RdmaCapability.RDMA_READ), "Should not support RDMA read");

    /**
     * Converter not associated with specific properties.
     */
    protected final List<Converter> converters = newArrayList();

    /**
     * Adds property names to include in the operation.
     *
     * @param propertyNames
     *            Array of property names. Must not be {@literal null} or an empty array.
     * @return This instance itself
     */

   * safe to do so. The exact circumstances under which a copy will or will not be performed are
   * undocumented and subject to change.
   *
   * <p>This method is not type-safe, as it may be called on a map with keys that are not mutually
   * comparable.
   *
   * @throws ClassCastException if the keys in {@code map} are not mutually comparable
   * @throws NullPointerException if any key or value in {@code map} is null

   * but note that lambdas and method references do not have human-readable {@link #toString()}
   * representations and are not serializable.
   */
  public static <T extends @Nullable Object> Predicate<T> isNull() {
    return ObjectPredicate.IS_NULL.withNarrowedType();
  }

  /**
   * Returns a predicate that evaluates to {@code true} if the object reference being tested is not
   * null.
   *

// the ETag of a singlepart SSE-S3 object is its content MD5.
//
// In case of SSE-C and SSE-KMS, the ETag of an object is computed
// differently. For singlepart uploads the ETag is not the content
// MD5 of the object. For multipart uploads the ETag is also not
// the MD5 of the individual part checksums but it still contains
// the number of parts as suffix.
//
// Instead, the ETag is kind of unpredictable for S3 clients when

	return "Bad sha256: Expected " + e.ExpectedSHA256 + " does not match calculated " + e.CalculatedSHA256
}

// BadDigest - Content-MD5 you specified did not match what we received.
type BadDigest struct {
	ExpectedMD5   string
	CalculatedMD5 string
}

func (e BadDigest) Error() string {
	return "Bad digest: Expected " + e.ExpectedMD5 + " does not match calculated " + e.CalculatedMD5
}