ToOptionalState::add,
          ToOptionalState::combine,
          ToOptionalState::getOptional,
          Collector.Characteristics.UNORDERED);

  /**
   * A collector that converts a stream of zero or one elements to an {@code Optional}.
   *
   * @throws IllegalArgumentException if the stream consists of two or more elements.
   * @throws NullPointerException if any element in the stream is {@code null}.

        channelInfo.setState(ChannelState.ACTIVE);
        int activeScore = channelInfo.getScore();
        assertTrue(activeScore < baseScore);

        // Failed channel should have zero score
        channelInfo.setState(ChannelState.FAILED);
        assertEquals(0, channelInfo.getScore());

        // Primary channel should have higher score
        channelInfo.setState(ChannelState.ESTABLISHED);

// [io.ByteScanner], and [io.RuneScanner] interfaces by reading from
// a byte slice.
// Unlike a [Buffer], a Reader is read-only and supports seeking.
// The zero value for Reader operates like a Reader of an empty slice.
type Reader struct {
	s        []byte
	i        int64 // current reading index
	prevRune int   // index of previous rune; or < 0
}

)

// Buffered input.

// Reader implements buffering for an io.Reader object.
// A new Reader is created by calling [NewReader] or [NewReaderSize];
// alternatively the zero value of a Reader may be used after calling [Reset]
// on it.
type Reader struct {
	buf          []byte
	rd           io.Reader // reader provided by the client
	r, w         int       // buf read and write positions

        assertArrayEquals(testFileId, copiedFileId);
    }

    @Test
    @DisplayName("Test with various file ID patterns")
    void testWithVariousFileIdPatterns() {
        // Test with all zeros
        byte[] zeroFileId = new byte[16];
        Smb2CloseRequest zeroRequest = new Smb2CloseRequest(mockConfig, zeroFileId, testFileName);
        testFileIdInRequest(zeroRequest, zeroFileId);

        assertTrue(createItem.isUpdated());
        assertEquals("newword", createItem.getNewInput());
        assertEquals("newword", createItem.toLineString());

        // Non-zero id should not auto-set newInput
        StopwordsItem existingItem = new StopwordsItem(1, "existingword");
        assertFalse(existingItem.isUpdated());
        assertNull(existingItem.getNewInput());

                            session.release();
                        }
                    }
                } catch (Exception e) {
                    if (!e.getMessage().contains("Usage count dropped below zero")) {
                        exceptions.add(e);
                    }
                } finally {
                    endLatch.countDown();
                }
            });
        }

     */
    public SMB1SigningDigest(final byte[] macSigningKey) {
        this.digest = Crypto.getMD5();
        this.macSigningKey = macSigningKey;
    }

    /**
     * Construct a digest with a non-zero starting sequence number
     *
     * @param macSigningKey
     *            The MAC signing key used for generating signatures
     * @param initialSequence
     *            The initial sequence number for signing

        SMBUtil.writeInt4(0, testBuffer, 4); // owner offset
        SMBUtil.writeInt4(0, testBuffer, 8); // group offset
        SMBUtil.writeInt4(100, testBuffer, 12); // SACL offset (non-zero but ignored)
        SMBUtil.writeInt4(0, testBuffer, 16); // DACL offset

        int size = securityDescriptor.decode(testBuffer, 0, testBuffer.length);

    /**
     * Stores a character mapping item in the specified dictionary.
     * <p>
     * This method performs either an insert operation (for new items with ID 0)
     * or an update operation (for existing items with non-zero ID) depending on
     * the item's current state.
     * </p>
     *
     * @param dictId the dictionary ID to store the character mapping item in
     * @param charMappingItem the character mapping item to store