func ARM64RegisterShift(reg, op, count int16) (int64, error) {
	// the base register of shift operations must be general register.
	if reg > arm64.REG_R31 || reg < arm64.REG_R0 {
		return 0, errors.New("invalid register for shift operation")
	}
	return int64(reg&31)<<16 | int64(op)<<22 | int64(uint16(count)), nil
}

     */
    public void waitForNoWaitingThreads() {
        int count = waitingThreadNames.size();
        while (count > 0) {
            if (logger.isInfoEnabled()) {
                logger.info("{} waiting thread(s).", count);
            }
            ThreadUtil.sleep(systemCpuCheckInterval);
            count = waitingThreadNames.size();
        }
    }

    /**

        assertFalse(ruleManager.hasRule(rule1));
        assertFalse(ruleManager.hasRule(rule2));
        assertFalse(ruleManager.hasRule(rule3));
    }

    /**
     * Test getRule call count
     */
    public void test_getRuleCallCount() {
        TestRule rule = new TestRule("rule1", true);
        ruleManager.addRule(rule);

        ResponseData responseData = new ResponseData();

        regA(builder);
        return builder;
    }

    protected ValueCountAggregationBuilder regCountA(String name, String field) {
        ValueCountAggregationBuilder builder = AggregationBuilders.count(name).field(field);
        regA(builder);
        return builder;
    }

    protected TermsAggregationBuilder regTermsA(String name, String field) {

        scoreUpdater.addScoreBooster(booster1);
        scoreUpdater.addScoreBooster(booster2);

        String result = scoreUpdater.execute();

        // Check format with class name, colon, count, and newline
        String[] lines = result.split("\n");
        assertEquals(2, lines.length);
        assertTrue(lines[0].matches("TestScoreBooster : \\d+"));
        assertTrue(lines[1].matches("TestScoreBooster : \\d+"));

    void testInvalidVersion() throws IOException {
        // Create minimal PAC structure with wrong version
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        writeLittleEndianInt(baos, 0); // buffer count = 0
        writeLittleEndianInt(baos, 99); // invalid version
        baos.write(new byte[1]); // Make it > 8 bytes
        byte[] pacData = baos.toByteArray();

     *
     * @return true if either query count map or field list is not null
     */
    public boolean hasFacetResponse() {
        return queryCountMap != null || fieldList != null;
    }

    /**
     * Represents a field facet with its name and value counts.
     * Each field facet contains multiple values with their respective document counts.
     */
    public static class Field {
        /**

        E lowerBound, BoundType lowerBoundType, E upperBound, BoundType upperBoundType) {
      return standardSubMultiset(lowerBound, lowerBoundType, upperBound, upperBoundType);
    }

    @Override
    public int count(@Nullable Object element) {
      return standardCount(element);
    }

    @Override
    public boolean equals(@Nullable Object object) {
      return standardEquals(object);
    }

    @Override

    }

    @Test
    void testReadDataWireFormat_emptyBuffer() throws Exception {
        // Test reading data from an empty buffer
        byte[] buffer = new byte[10];

        // Set data count to test return value
        response.setDataCount(5);

        // With 0 entries, should return dataCount
        int result = response.readDataWireFormat(buffer, 0, 0);
        // Should return dataCount

    // Put a floor on the keep alive duration, otherwise cleanup will spin loop.
    require(keepAliveDuration > 0L) { "keepAliveDuration <= 0: $keepAliveDuration" }
  }

  fun idleConnectionCount(): Int =
    connections.count {
      it.withLock { it.calls.isEmpty() }
    }

  fun connectionCount(): Int = connections.size

  /**
   * Attempts to acquire a recycled connection to [address] for [connectionUser]. Returns the connection if it