}

        public void alloc(Block block) {
            if (block.hasPos()) {
                return;
            }

            int requiredSize = block.getSize();

            if (entries.isEmpty() || requiredSize <= largestInNextBlock) {
                if (nextBlock.isNull()) {
                    return;
                }
                getNextBlock().alloc(block);

// ClassInstallParams method retrieves class installation parameters for a device information set or a particular device information element.
func (deviceInfoSet DevInfo) ClassInstallParams(deviceInfoData *DevInfoData, classInstallParams *ClassInstallHeader, classInstallParamsSize uint32, requiredSize *uint32) error {

			// Calculate size of the mandatory part of the trace.
			// This includes thread names and stack frames for
			// required events.
			cw.size = 0
			enc := json.NewEncoder(&cw)
			enc.Encode(data)
			requiredSize := cw.size

			// Then calculate size of each individual event and
			// their stack frames, grouping them into ranges. We
			// only include stack frames relevant to the events in
			// the range to reduce overhead.

func setupDiClassGuidsFromNameEx(className *uint16, classGuidList *GUID, classGuidListSize uint32, requiredSize *uint32, machineName *uint16, reserved uintptr) (err error) {
	r1, _, e1 := syscall.Syscall6(procSetupDiClassGuidsFromNameExW.Addr(), 6, uintptr(unsafe.Pointer(className)), uintptr(unsafe.Pointer(classGuidList)), uintptr(classGuidListSize), uintptr(unsafe.Pointer(requiredSize)), uintptr(unsafe.Pointer(machineName)), uintptr(reserved))
	if r1 == 0 {