*/
  static @Nullable Object[] copyAsObjectArray(@Nullable Object[] elements, int offset, int length) {
    checkPositionIndexes(offset, offset + length, elements.length);
    if (length == 0) {
      return new Object[0];
    }
    @Nullable Object[] result = new Object[length];
    arraycopy(elements, offset, result, 0, length);
    return result;
  }

  @CanIgnoreReturnValue

    int maxSuffixLength = min(a.length(), b.length());
    int s = 0;
    while (s < maxSuffixLength && a.charAt(a.length() - s - 1) == b.charAt(b.length() - s - 1)) {
      s++;
    }
    if (validSurrogatePairAt(a, a.length() - s - 1)
        || validSurrogatePairAt(b, b.length() - s - 1)) {
      s--;
    }
    return a.subSequence(a.length() - s, a.length()).toString();
  }

  /**

        byte[] outputBuffer = new byte[testData.length + 100];
        int writtenBytes =
                compressionService.decompress(compressed, 0, compressed.length, outputBuffer, 50, CompressionService.COMPRESSION_LZ77);

        assertEquals(testData.length, writtenBytes);

        byte[] extracted = new byte[testData.length];
        System.arraycopy(outputBuffer, 50, extracted, 0, testData.length);

        assertFalse(result.isEmpty());
        assertEquals(size * 2, result.length()); // Each byte becomes 2 hex chars
    }

    @Test
    @DisplayName("Should format with specific offset and length")
    void testHexdumpWithOffsetAndLength() {
        // Given
        byte[] data = createTestData(64);
        int offset = 16;
        int length = 32;

        // When

      ensureRoomFor(values.length());
      System.arraycopy(values.array, values.start, array, count, values.length());
      count += values.length();
      return this;
    }

    private void ensureRoomFor(int numberToAdd) {
      int newCount = count + numberToAdd; // TODO(kevinb): check overflow now?
      if (newCount > array.length) {

        }
        if (isDirect) {
            out.writeDirect(buf, off, length, 1);
            return;
        }
        out.write(buf, off, length);
    }

    @Override
    protected void doReceiveFragment(final byte[] buf, final boolean isDirect) throws IOException {
        int off, flags, length;

        if (buf.length < max_recv) {
            throw new IllegalArgumentException("buffer too small");
        }

    private boolean processWord() {
        if ((peekct & CT_ALPHA) != 0) {
            int i = 0;
            do {
                if (i >= buf.length) {
                    final char[] nb = new char[buf.length * 2];
                    System.arraycopy(buf, 0, nb, 0, buf.length);
                    buf = nb;
                }
                buf[i++] = (char) peekc;
                peekc = read();

  public final Entry<String, String>[] createArray(int length) {
    return (Entry<String, String>[]) new Entry<?, ?>[length];
  }

  @Override
  public final String[] createKeyArray(int length) {
    return new String[length];
  }

  @Override
  public final String[] createValueArray(int length) {
    return new String[length];
  }

  /** Returns the original element list, unchanged. */
  @Override

        System.arraycopy(sourceData, 0, buffer, 10, sourceData.length);

        // Execute
        int result = response.readDataWireFormat(buffer, 10, sourceData.length);

        // Verify
        assertEquals(sourceData.length, result);
        // Check that data was copied to output buffer
        for (int i = 0; i < sourceData.length; i++) {
            assertEquals(sourceData[i], outputBuffer[i]);
        }
    }

        HMACT64 clonedHmac = (HMACT64) originalHmac.clone();

        assertNotNull(clonedHmac);
        assertNotSame(originalHmac, clonedHmac);

        // Both should produce the same result when given the same remaining data
        originalHmac.engineUpdate(TEST_DATA, TEST_DATA.length / 2, TEST_DATA.length - TEST_DATA.length / 2);