List<Exception> exceptions = new ArrayList<>();

        // When - Multiple threads get and release buffers
        for (int t = 0; t < threadCount; t++) {
            executor.submit(() -> {
                try {
                    startLatch.await();

                    for (int i = 0; i < opsPerThread; i++) {
                        // Get buffer
                        byte[] buffer = BufferCache.getBuffer();

    }

    @Override
    public @Nullable V get(@Nullable Object key) {
      Integer index = keyIndex.get(key);
      if (index == null) {
        return null;
      } else {
        return getValue(index);
      }
    }

    @Override
    public @Nullable V put(K key, @ParametricNullness V value) {
      Integer index = keyIndex.get(key);
      if (index == null) {

    }

    /**
     * Get a Kuromoji item.
     *
     * @param dictId The dictionary ID.
     * @param id The ID of the Kuromoji item.
     * @return An optional entity of the Kuromoji item.
     */
    public OptionalEntity<KuromojiItem> getKuromojiItem(final String dictId, final long id) {
        return getKuromojiFile(dictId).map(file -> file.get(id).get());
    }

    /**
     * Store a Kuromoji item.

     */
    WitnessEventType(int value) {
        this.value = value;
    }

    /**
     * Gets the numeric event type value.
     *
     * @return the event type value
     */
    public int getValue() {
        return value;
    }

    /**
     * Gets a WitnessEventType from its numeric value.
     *
     * @param value the numeric value
     * @return the corresponding WitnessEventType

    /**
     * Splits this request for processing.
     *
     * @return the following message
     */
    CommonServerMessageBlockRequest split();

    /**
     * Gets the size of this message.
     *
     * @return the size of this message
     */
    int size();

    /**
     * Creates a cancel request for this request.
     *
     * @return create cancel request

        ImmutableList.of(
            QueryOp.create(
                "BiMap.get",
                (biMap, key) -> {
                  Object unused = biMap.get(key);
                },
                Math::log),
            QueryOp.create(
                "BiMap.inverse.get",
                (biMap, o) -> {
                  Object unused = biMap.inverse().get(o);
                },
                Math::log)));
  }

        configField.setAccessible(true);
        assertSame(mockConfig, configField.get(response));

        // Verify queryAddress is set
        Field queryAddressField = NodeStatusResponse.class.getDeclaredField("queryAddress");
        queryAddressField.setAccessible(true);
        assertSame(mockQueryAddress, queryAddressField.get(response));

        // Verify recordName is initialized

            result.setCreatedTime(DfTypeUtil.toLong(source.get("createdTime")));
            result.setQueries(toStringArray(source.get("queries")));
            result.setTerm(DfTypeUtil.toString(source.get("term")));
            result.setUpdatedBy(DfTypeUtil.toString(source.get("updatedBy")));
            result.setUpdatedTime(DfTypeUtil.toLong(source.get("updatedTime")));

        byte[] third = impl.getBuffer(); // cache empty -> new with size 3

        assertSame(a, first, "First get should return first cached buffer");
        assertSame(c, second, "Second get should return second cached buffer");
        assertNotSame(d, third, "Third get should allocate a new buffer (not the dropped one)");
        assertEquals(3, third.length, "Allocated buffer length matches configured maximum size");

    private int numReferrals;
    private int tflags;
    private Referral[] referrals;

    /**
     * Get the number of characters consumed from the path
     *
     * @return the pathConsumed
     */
    public final int getPathConsumed() {
        return this.pathConsumed;
    }

    /**
     * Get the number of referrals in the response
     *
     * @return the numReferrals
     */