assertThrows(IllegalStateException.class, () -> peekingIterator.remove());

    assertEquals(
        "After remove() throws exception, peek should still be ok", "B", peekingIterator.peek());

    /* Should recover to be able to remove() after next(). */
    assertEquals("B", peekingIterator.next());
    peekingIterator.remove();
    assertEquals("Should have removed an element", 2, list.size());

		}
		if !bytes.Equal(sealedKey.Key[:], test.SealedKey.Key[:]) {
			t.Errorf("Test %d: sealed key mismatch: got '%v' - want '%v'", i, sealedKey.Key, test.SealedKey.Key)
		}
	}

	defer func() {
		if err := recover(); err == nil || err != logger.ErrCritical {
			t.Errorf("Expected '%s' panic for invalid seal algorithm but got '%s'", logger.ErrCritical, err)
		}
	}()

 * Transparent GZIP shrinks download sizes.
 * Response caching avoids the network completely for repeat requests.

OkHttp perseveres when the network is troublesome: it will silently recover from common connection
problems. If your service has multiple IP addresses, OkHttp will attempt alternate addresses if the
first connect fails. This is necessary for IPv4+IPv6 and services hosted in redundant data

 5. It sends the HTTP request and reads the response.

If there's a problem with the connection, OkHttp will select another route and try again. This allows OkHttp to recover when a subset of a server's addresses are unreachable. It's also useful when a pooled connection is stale or if the attempted TLS version is unsupported.

	if debugNoExit {
		freeze := func(_ int) {
			// Infinite blocking op
			<-make(chan struct{})
		}

		// Override the logger os.Exit()
		logger.ExitFunc = freeze

		defer func() {
			if err := recover(); err != nil {
				fmt.Println("panic:", err)
				fmt.Println("")
				fmt.Println(string(debug.Stack()))
			}
			freeze(-1)
		}()
	}

	// Run the app - exit on error.

    boolean addedPredecessor;

    if (previousValue == null) {
      addedPredecessor = true;
    } else if (previousValue instanceof PredAndSucc) {
      // Restore previous PredAndSucc object.
      adjacentNodeValues.put(node, previousValue);
      addedPredecessor = false;
    } else if (previousValue != PRED) { // successor

	// if object upload fails stop the test.
	if err != nil {
		t.Fatalf("Error uploading object: <ERROR> %v", err)
	}

	// initialize httptest Recorder, this records any mutations to response writer inside the handler.
	rec := httptest.NewRecorder()
	// construct HTTP request for DELETE bucket.

## Version 1.5.1

_2014-03-11_

 * Fix 1.5.0 regression where connections should not have been recycled.
 * Fix 1.5.0 regression where transparent Gzip was broken by attempting to
   recover from another I/O failure.
 * Fix problems where spdy/3.1 headers may not have been compressed properly.
 * Fix problems with spdy/3.1 and http/2 where the wrong window size was being
   used.

![Events Diagram](../assets/images/******@****.***)

### Events with Retries and Follow-Ups

OkHttp is resilient and can automatically recover from some connectivity failures. In this case, the `connectFailed()` event is not terminal and not followed by `callFailed()`. Event listeners will receive multiple events of the same type when retries are attempted.

        RenderDataUtil.register(data, "relatedContentItems", relatedContentService.getRelatedContentList(relatedContentPager)); // page navi

        // restore from pager
        copyBeanToBean(relatedContentPager, form, op -> op.include("term", "content"));
    }

    // ===================================================================================