* writer will close the target if it is {@link Closeable}, and flushing the writer will flush the
   * target if it is {@link java.io.Flushable}.
   *
   * @param target the object to which output will be sent
   * @return a new Writer object, unless target is a Writer, in which case the target is returned
   */
  public static Writer asWriter(Appendable target) {
    if (target instanceof Writer) {
      return (Writer) target;
    }

Regular Reads will block until data is available, but not wait for a full buffer. 
Writes will block until there is space available and writes bigger than the buffer will wait for reads to make space.

`TryRead` and `TryWrite` are still available for non-blocking reads and writes.

To signify the end of the stream, close the ring buffer from the writer side with `rb.CloseWriter()`

pkg compress/zlib, func NewWriter(io.Writer) *Writer
pkg compress/zlib, func NewWriterLevel(io.Writer, int) (*Writer, error)
pkg compress/zlib, func NewWriterLevelDict(io.Writer, int, []uint8) (*Writer, error)
pkg compress/zlib, method (*Writer) Close() error
pkg compress/zlib, method (*Writer) Flush() error
pkg compress/zlib, method (*Writer) Write([]uint8) (int, error)
pkg compress/zlib, type Writer struct

 */
@Deprecated(since = "4.0.0")
public interface ToolchainsWriter {

    /**
     * Writes the supplied toolchains to the specified character writer. The writer will be automatically closed before
     * the method returns.
     *
     * @param output The writer to serialize the toolchains to, must not be {@code null}.

	}
	result := writer.write(newRecordsMessage(writer.payloadBuffer[0:writer.payloadBufferIndex]))
	if result {
		atomic.AddInt64(&writer.bytesReturned, int64(writer.payloadBufferIndex))
		writer.payloadBufferIndex = 0
	}
	return result
}

// Finish is the last call to the message writer - it sends any
// remaining record payload, then sends statistics and finally the end
// message.

	}
	for i := 0; i < chunks; i++ {
		_, err := f.Write(chunk)
		if err != nil {
			t.Fatal("write chunk:", err)
		}
	}
	if frag := int(size % chunkSize); frag > 0 {
		_, err := f.Write(chunk[:frag])
		if err != nil {
			t.Fatal("write chunk:", err)
		}
	}
	end := []byte("END\n")
	_, err = f.Write(end)
	if err != nil {
		t.Fatal("write end:", err)
	}
	if err := w.Close(); err != nil {

	lrwm := NewLRWMutex()

	// fmt.Println("Getting initial write lock")
	if !lrwm.GetLock(ctx, "", "", time.Second) {
		panic("Failed to acquire initial write lock")
	}

	go func() {
		time.Sleep(2 * time.Second)
		lrwm.Unlock()
		// fmt.Println("Initial write lock released, waiting...")
	}()

	// fmt.Println("Trying to acquire 2nd write lock, waiting...")
	locked = lrwm.GetLock(ctx, "", "", duration)

  fun fromDer(byteString: ByteString): T {
    val buffer = Buffer().write(byteString)
    val reader = DerReader(buffer)
    return fromDer(reader)
  }

  /**
   * Writes [value] to this adapter, unless it is the default value and can be safely omitted.
   *
   * If this does write a value, it will write a tag and a length and a full value.
   */
  fun toDer(
    writer: DerWriter,
    value: T,
  )

      }
      if (associatedStreamId == 0) {
        writer.headers(outFinished, streamId, requestHeaders)
      } else {
        require(!client) { "client streams shouldn't have associated stream IDs" }
        // HTTP/2 has a PUSH_PROMISE frame.
        writer.pushPromise(associatedStreamId, streamId, requestHeaders)
      }
    }

    if (flushHeaders) {
      writer.flush()
    }

    return stream
  }

    }

    return result
  }

  override fun toDer(
    writer: DerWriter,
    value: T,
  ) {
    if (typeHint) {
      writer.typeHint = value
    }

    if (isOptional && value == defaultValue) {
      // Nothing to write!
      return
    }

    writer.write(name, tagClass, tag) {
      codec.encode(writer, value)
    }
  }

  /**