// its required to write the policies first before running tests on GetBucketPolicy.
	for i, testPolicy := range putTestPolicies {
		// obtain the put bucket policy request body.
		bucketPolicyStr := fmt.Sprintf(bucketPolicyTemplate, testPolicy.bucketName, testPolicy.bucketName)
		// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.
		recV4 := httptest.NewRecorder()

    client.webSocket!!.close(1000, "Hello")
    server.processNextFrame()
    // Not closed until close reply is received.
    assertThat(client.closed).isFalse()

    // Manually write an invalid masked close frame.
    server.sink.write("888760b420bb635c68de0cd84f".decodeHex()).emit()
    client.processNextFrame() // Detects error, disconnects immediately since close already sent.
    client.webSocket!!.finishReader()

	buf := bytes.Buffer{}
	buf.Write([]byte{'h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd'})
	os.Stdout.Write(buf.Bytes())
	// Output: hello world
}

func ExampleBuffer_AvailableBuffer() {
	var buf bytes.Buffer
	for i := 0; i < 4; i++ {
		b := buf.AvailableBuffer()
		b = strconv.AppendInt(b, int64(i), 10)
		b = append(b, ' ')
		buf.Write(b)
	}
	os.Stdout.Write(buf.Bytes())
	// Output: 0 1 2 3
}

	t.Helper()
	for _, expected := range expected {
		if !strings.Contains(output, expected) {
			t.Errorf("expected %s included in writer output, did not find", expected)
		}
	}
	for _, unexpected := range unexpected {
		if strings.Contains(output, unexpected) {
			t.Errorf("unexpected string %s included in writer output", unexpected)
		}
	}

			Addr:  owner,
			Locks: locksHeld,
		})
	}
	var exp madmin.LockEntries
	for _, lri := range lris {
		lockType := func(lri lockRequesterInfo) string {
			if lri.Writer {
				return "WRITE"
			}
			return "READ"
		}
		exp = append(exp, madmin.LockEntry{
			Resource:   lri.Name,
			Type:       lockType(lri),
			ServerList: owners,
			Owner:      lri.Owner,

                }
                return new StreamResponse("metadata").contentType("application/xhtml+xml").stream(out -> {
                    try (final Writer writer = new OutputStreamWriter(out.stream(), Constants.UTF_8_CHARSET)) {
                        writer.write(metadata);
                    }
                });
            } catch (final SsoMessageException e) {
                throw e;

            try {
                try (Writer writer = new BufferedWriter(new OutputStreamWriter(Files.newOutputStream(tempFile), getCsvEncoding()))) {
                    elevateWordService.exportCsv(writer);
                } catch (final Exception e) {
                    logger.warn("Failed to process a request.", e);

In this example, the messages will be written to the `log.txt` file *after* the response is sent.

If there was a query in the request, it will be written to the log in a background task.

And then another background task generated at the *path operation function* will write a message using the `email` path parameter.

## Technical Details

///

/// tip

Notice that in this case we are using a standard Python `open()` function that interacts with a file.

So, it involves I/O (input/output), that requires "waiting" for things to be written to disk.

But `open()` doesn't use `async` and `await`.

So, we declare the event handler function with standard `def` instead of `async def`.

///

### `startup` and `shutdown` together

// CHECKSTYLE_OFF: RegexpHeader|LineLength
/**
 * XML reader and writer classes for Maven POM, generated from <code>maven.mdo</code> model.
 * These classes use
 * <a href="https://codehaus-plexus.github.io/plexus-utils/apidocs/org/codehaus/plexus/util/xml/pull/package-summary.html">plexus-utils'
 * XML Pull Parser API</a> for their internal XML handling and