How to use the usb.setDebugLevel function in usb

const xferInEndpoint: usb.InEndpoint = inEndpoint.transfer(1, (error: string, data: Buffer) => inEndpoint);
inEndpoint.startPoll(1, 1);
inEndpoint.stopPoll(() => null);

const outEndpoint: usb.OutEndpoint = new usb.OutEndpoint(device, endpointDesc);
outEndpoint.direction = "out";
outEndpoint.transferType = 1;
outEndpoint.timeout = 1;
outEndpoint.descriptor = endpointDesc;
const xferOutEndpoint: usb.OutEndpoint = outEndpoint.transfer(new Buffer([]), (error: string) => null);
outEndpoint.transferWithZLP(new Buffer([]), (error: string) => null);

const findByDevice: usb.Device = usb.findByIds(1, 1);
usb.on("hey", (device: usb.Device) => null);
const deviceList: usb.Device[] = usb.getDeviceList();
usb.setDebugLevel(1);

const CHECK_LIBUSB_CLASS_PER_INTERFACE: number = usb.LIBUSB_CLASS_PER_INTERFACE;
const CHECK_LIBUSB_CLASS_AUDIO: number = usb.LIBUSB_CLASS_AUDIO;
const CHECK_LIBUSB_CLASS_COMM: number = usb.LIBUSB_CLASS_COMM;
const CHECK_LIBUSB_CLASS_HID: number = usb.LIBUSB_CLASS_HID;
const CHECK_LIBUSB_CLASS_PRINTER: number = usb.LIBUSB_CLASS_PRINTER;
const CHECK_LIBUSB_CLASS_PTP: number = usb.LIBUSB_CLASS_PTP;
const CHECK_LIBUSB_CLASS_MASS_STORAGE: number = usb.LIBUSB_CLASS_MASS_STORAGE;
const CHECK_LIBUSB_CLASS_HUB: number = usb.LIBUSB_CLASS_HUB;
const CHECK_LIBUSB_CLASS_DATA: number = usb.LIBUSB_CLASS_DATA;
const CHECK_LIBUSB_CLASS_WIRELESS: number = usb.LIBUSB_CLASS_WIRELESS;
const CHECK_LIBUSB_CLASS_APPLICATION: number = usb.LIBUSB_CLASS_APPLICATION;
const CHECK_LIBUSB_CLASS_VENDOR_SPEC: number = usb.LIBUSB_CLASS_VENDOR_SPEC;
// libusb_standard_request
const CHECK_LIBUSB_REQUEST_GET_STATUS: number = usb.LIBUSB_REQUEST_GET_STATUS;
const CHECK_LIBUSB_REQUEST_CLEAR_FEATURE: number = usb.LIBUSB_REQUEST_CLEAR_FEATURE;

var usb         = require('usb'),
    _           = require('underscore'),
    async       = require('async');

usb.setDebugLevel(3);

function RocketLauncher()
{
  this.launcher_device = null;

  this.commands = {
    'down'        :   0x01,
    'up'          :   0x02,
    'left'        :   0x04,
    'right'       :   0x08,
    'shoot'       :   0x10,
    'stop'        :   0x20,
    'boom'        :   0x40
  };

  this.acquireDevice = function()

function avrgirlIspmkii(chip) {
  var self = this;

  usb.setDebugLevel(0);

  var VID = 0x03eb;
  var PID = 0x2104;

  var device = usb.findByIds(VID, PID);

  if (!device) {
    return new Error('Could not find a connected AVRISP mkii device.');
  }

  var options = {
    chip: chip,
    debug: false,
    comm: device,
    frameless: true
  };