* #iterator()} method after the first, and whose iterator is always unmodifiable.
 *
 * <p>The {@code Iterable} specification does not make it absolutely clear what should happen on a
 * second invocation, so implementors have made various choices, including:
 *
 * <ul>
 *   <li>returning the same iterator again
 *   <li>throwing an exception of some kind

        byte[] buffer1 = testCache.getBuffer();
        byte[] buffer2 = testCache.getBuffer();

        // Then
        assertNotNull(buffer1, "First buffer should not be null");
        assertNotNull(buffer2, "Second buffer should not be null");
        assertEquals(1024, buffer1.length, "Buffer should have expected size");
        assertEquals(1024, buffer2.length, "Buffer should have expected size");

And also after the `response` is generated, before returning it.

For example, you could add a custom header `X-Process-Time` containing the time in seconds that it took to process the request and generate a response:

{* ../../docs_src/middleware/tutorial001.py hl[10,12:13] *}

/// tip

	// prepare getElapsedTime() to calculate elapsed time since we started trying formatting disks.
	// All times are rounded to avoid showing milli, micro and nano seconds
	formatStartTime := time.Now().Round(time.Second)
	getElapsedTime := func() string {
		return time.Now().Round(time.Second).Sub(formatStartTime).String()
	}

	var (
		tries   int
		verbose bool
	)

	// Initialize all storage disks

  auto iter = name_ranges.find(arg_name);
  if (iter == name_ranges.end()) {
    status->status = InvalidArgument("Output arg '", arg_name, "' not found");
    return -1;
  }
  return iter->second.second - iter->second.first;
}

int TF_OperationNumInputs(TF_Operation* oper) {
  return oper->node.num_inputs();
}

TF_DataType TF_OperationInputType(TF_Input oper_in) {

| user               | string                                  | Identifier for owner of requested credentials          |
| maxValiditySeconds | integer (>= 900 seconds and < 365 days) | Maximum allowed expiry duration for the credentials    |
| claims             | key-value pairs                         | Claims to be associated with the requested credentials |

		// this is a fresh setup, no need to trigger healing.
		return Endpoints{}
	}
	return disksToHeal
}

var newDiskHealingTimeout = newDynamicTimeout(30*time.Second, 10*time.Second)

var errRetryHealing = errors.New("some items failed to heal, we will retry healing this drive again")

func healFreshDisk(ctx context.Context, z *erasureServerPools, endpoint Endpoint) error {

			var xl xlMetaV2
			ids := make([]string, size)
			for i := range size {
				fi.VersionID = mustGetUUID()
				fi.DataDir = mustGetUUID()
				ids[i] = fi.VersionID
				fi.ModTime = fi.ModTime.Add(-time.Second)
				xl.AddVersion(fi)
			}
			// Encode all. This is used for benchmarking.
			enc, err := xl.AppendTo(nil)
			if err != nil {
				b.Fatal(err)
			}
			b.Logf("Serialized size: %d bytes", len(enc))

     */
    public long getRetryDelay() {
        switch (severity) {
        case RECOVERABLE:
            return 100; // Immediate retry with small delay
        case TRANSIENT:
            return 5000; // Wait 5 seconds
        default:
            return 0; // No retry
        }
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();

            }
            thread = null;
            try {
                executorService.shutdown();
                executorService.awaitTermination(60, TimeUnit.SECONDS);
            } catch (final InterruptedException e) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Interrupted.", e);
                }
            } finally {