Sample handler:
```go
    handler :=  func(ctx context.Context, payload []byte, in <-chan []byte, out chan<- []byte) *RemoteErr {
        fmt.Println("Got request with initial payload", p, "from", GetCaller(ctx context.Context))
        fmt.Println("Subroute:", GetSubroute(ctx))
        for {
            select {
            case <-ctx.Done():
                return nil
            case req, ok := <-in:

func (p *scannerMetrics) currentPathUpdater(disk, initial string) (update func(path string), done func()) {
	initialPtr := unsafe.Pointer(&initial)
	tracker := &currentPathTracker{
		name: &initialPtr,
	}

	p.currentPaths.Store(disk, tracker)
	return func(path string) {
			atomic.StorePointer(tracker.name, unsafe.Pointer(&path))
		}, func() {
			p.currentPaths.Delete(disk)
		}
}

        message.resetStyle().append(resource.getResourceName());

        out.println(message);
    }

    @Override
    public void transferCorrupted(TransferEvent event) throws TransferCancelledException {
        TransferResource resource = event.getResource();
        // TODO This needs to be colorized
        out.println("[WARNING] " + event.getException().getMessage() + " from " + resource.getRepositoryId() + " for "

import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/** Unit tests for {@link LongAdder}. */
@NullUnmarked
public class LongAdderTest extends TestCase {

  /**
   * No-op null-pointer test for {@link LongAdder} to override the {@link PackageSanityTests}
   * version, which checks package-private methods that we don't want to have to annotate as {@code
   * Nullable} because we don't want diffs from jsr166e.
   */

	if resp.StatusCode != http.StatusOK {
		// uncomment this for debugging when needed.
		// reqBytes, _ := httputil.DumpRequest(req, false)
		// fmt.Println(string(reqBytes))
		// respBytes, _ := httputil.DumpResponse(resp, true)
		// fmt.Println(string(respBytes))
		return nil, errors.New(resp.Status)
	}

	claims := map[string]any{}
	if err = json.NewDecoder(resp.Body).Decode(&claims); err != nil {

import (
	"fmt"

	"github.com/smallnest/ringbuffer"
)

func main() {
	rb := ringbuffer.New(1024)

	// write
	rb.Write([]byte("abcd"))
	fmt.Println(rb.Length())
	fmt.Println(rb.Free())

	// read
	buf := make([]byte, 4)
	rb.Read(buf)
	fmt.Println(string(buf))
}
```

It is possible to use an existing buffer with by replacing `New` with `NewBuffer`.


# Blocking vs Non-blocking

func main() {
	flag.Parse()
	if clientID == "" {
		flag.PrintDefaults()
		return
	}

	ddoc, err := parseDiscoveryDoc(configEndpoint)
	if err != nil {
		log.Println(fmt.Errorf("Failed to parse OIDC discovery document %s", err))
		fmt.Println(err)
		return
	}

	scopes := ddoc.ScopesSupported
	if clientScopes != "" {
		scopes = strings.Split(clientScopes, ",")
	}

	ctx := context.Background()

	buf.Write([]byte{0, 24})
	buf.WriteString("application/octet-stream")

	buf.WriteByte(11)
	buf.WriteString(":event-type")
	buf.WriteByte(7)
	buf.Write([]byte{0, 7})
	buf.WriteString("Records")

	fmt.Println(buf.Bytes())
}

// Continuation Message
// ====================
// Header specification
// --------------------
// Continuation messages contain two headers, as follows:

        .build()

    client.newCall(request).execute().use { response ->
      if (!response.isSuccessful) throw IOException("Unexpected code $response")

      println("Server: ${response.header("Server")}")
      println("Date: ${response.header("Date")}")
      println("Vary: ${response.headers("Vary")}")
    }
  }
}

fun main() {
  AccessHeaders().run()

		//nolint:staticcheck // SA6002 IT IS A GENERIC VALUE! (and always a pointer)
		h.reqPool.Put(r)
	}
}

// PutResponse will accept a response for reuse.
// These should be returned by the caller.
func (h *StreamTypeHandler[Payload, Req, Resp]) PutResponse(r Resp) {
	if r != h.nilResp {
		//nolint:staticcheck // SA6002 IT IS A GENERIC VALUE! (and always a pointer)
		h.respPool.Put(r)
	}
}