static final long serialVersionUID = 1L;

    private transient Entry header = new Entry(null, null, null);

    private transient int size = 0;

    /**
     * Creates an {@link SLinkedList}.
     */
    public SLinkedList() {
        header.next = header;
        header.previous = header;
    }

    /**
     * Returns the first element.
     *
     * @return the first element

    /**
     * Retrieves a specific request header by its ID.
     *
     * @param id the unique identifier of the request header
     * @return an OptionalEntity containing the request header if found, empty otherwise
     */
    public OptionalEntity<RequestHeader> getRequestHeader(final String id) {
        return requestHeaderBhv.selectByPK(id);
    }

    /**
     * Stores a request header configuration to the database.

		f:      formatGzip,
	},
	{
		// Zstd default header.
		header: []byte{0x28, 0xb5, 0x2f, 0xfd},
		f:      formatZstd,
	},
	{
		// Zstd skippable frame header.
		header: []byte{0x2a, 0x4d, 0x18},
		f:      formatZstd,
	},
	{
		// LZ4
		header: []byte{0x4, 0x22, 0x4d, 0x18},
		f:      formatLZ4,
	},
	{
		// Snappy/S2 stream
		header: []byte{0xff, 0x06, 0x00, 0x00},
		f:      formatS2,
	},
	{

	tr := NewReader(&buffer)

	for {
		header, err := tr.Next()
		if err == io.EOF {
			break
		}
		if err != nil {
			t.Fatalf("Failed to read header: %s", err)
		}
		if header.Typeflag != TypeReg {
			t.Fatalf("Typeflag should've been %d, found %d", TypeReg, header.Typeflag)
		}
	}
}

// failOnceWriter fails exactly once and then always reports success.
type failOnceWriter bool

    }

    @Test
    @DisplayName("Should create transform header with correct size")
    void testTransformHeaderSize() {
        // When
        int headerSize = transformHeader.size();

        // Then
        assertEquals(52, headerSize); // SMB2 Transform Header is 52 bytes
    }

    // Note: SMB2 Transform Header doesn't have a protocol ID field

		MaxMetadataSize = 1 << 20 // max. size of the metadata
		Version         = 1
	)

	var header [5]byte
	if _, err := io.ReadFull(ciphertext, header[:]); err != nil {
		return nil, err
	}
	if header[0] != Version {
		return nil, fmt.Errorf("config: unknown ciphertext version %d", header[0])
	}
	size := binary.LittleEndian.Uint32(header[1:])
	if size > MaxMetadataSize {

        assertEquals("processed_site1", result); // Still site1 due to header precedence

        // Test with custom header
        request.addHeader("Custom-Header", "custom.value");
        result = virtualHostHelper.processVirtualHost(s -> "processed_" + s, "default");
        assertEquals("processed_site1", result); // Still site1 due to header precedence
    }

    @Test

    /**
     * CORS header for specifying allowed headers.
     */
    protected static final String ACCESS_CONTROL_ALLOW_HEADERS = "Access-Control-Allow-Headers";

    /**
     * CORS header for specifying allowed HTTP methods.
     */
    protected static final String ACCESS_CONTROL_ALLOW_METHODS = "Access-Control-Allow-Methods";

    /**
     * CORS header for allowing private network access.
     */

    }
  }

  private fun send404(
    stream: Http2Stream,
    path: String,
  ) {
    val responseHeaders =
      listOf(
        Header(":status", "404"),
        Header(":version", "HTTP/1.1"),
        Header("content-type", "text/plain"),
      )
    stream.writeHeaders(
      responseHeaders = responseHeaders,
      outFinished = false,
      flushHeaders = false,
    )

        header.originalMessageSize = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

        // Skip reserved (2 bytes)
        bufferIndex += 2;

        // Read flags
        header.flags = SMBUtil.readInt2(buffer, bufferIndex);
        bufferIndex += 2;

        // Read session ID
        header.sessionId = SMBUtil.readInt8(buffer, bufferIndex);

        return header;
    }