How to use the multicast-dns-service-types.stringify function in multicast-dns-service-types

function Service (opts) {
  if (!opts.name) throw new Error('Required name not given')
  if (!opts.type) throw new Error('Required type not given')
  if (!opts.port) throw new Error('Required port not given')

  this.name = opts.name
  this.protocol = opts.protocol || 'tcp'
  this.type = serviceName.stringify(opts.type, this.protocol)
  this.host = opts.host || os.hostname()
  this.port = opts.port
  this.fqdn = this.name + '.' + this.type + TLD
  this.subtypes = opts.subtypes || null
  this.txt = opts.txt || null
  this.published = false

  this._activated = false // indicates intent - true: starting/started, false: stopping/stopped
}

function Service (opts) {
  if (!opts.name) throw new Error('Required name not given')
  if (!opts.type) throw new Error('Required type not given')
  if (!opts.port) throw new Error('Required port not given')

  this.name = opts.name
  this.protocol = opts.protocol || 'tcp'
  this.type = serviceName.stringify(opts.type, this.protocol)
  this.host = opts.host || os.hostname()
  this.port = opts.port
  this.fqdn = this.name + '.' + this.type + TLD
  this.subtypes = opts.subtypes || null
  this.txt = opts.txt || null
  this.published = false

  this._activated = false // indicates intent - true: starting/started, false: stopping/stopped
}

function Service (opts) {
  if (!opts.name) throw new Error('Required name not given')
  if (!opts.type) throw new Error('Required type not given')
  if (!opts.port) throw new Error('Required port not given')

  this.name = opts.name
  this.protocol = opts.protocol || 'tcp'
  this.type = serviceName.stringify(opts.type, this.protocol)
  this.host = opts.host || os.hostname()
  this.port = opts.port
  this.fqdn = this.name + '.' + this.type + TLD
  this.subtypes = opts.subtypes || null
  this.txt = opts.txt || null
  this.published = false

  this._activated = false // indicates intent - true: starting/started, false: stopping/stopped
}

function Browser (mdns, opts, onup) {
  if (typeof opts === 'function') return new Browser(mdns, null, opts)

  EventEmitter.call(this)

  this._mdns = mdns
  this._onresponse = null
  this._serviceMap = {}
  this._txt = dnsTxt(opts.txt)

  if (!opts || !opts.type) {
    this._name = WILDCARD
    this._wildcard = true
  } else {
    this._name = serviceName.stringify(opts.type, opts.protocol || 'tcp') + TLD
    if (opts.name) this._name = opts.name + '.' + this._name
    this._wildcard = false
  }

  this.services = []

  if (onup) this.on('up', onup)

  this.start()
}

var Browser = module.exports = function (protocol, type, onup) {
  if (!(this instanceof Browser)) return new Browser(protocol, type, onup)
  if (!type) throw new Error('Required type not given')

  EventEmitter.call(this)

  if (onup) this.on('up', onup)

  this._name = serviceName.stringify(type, protocol) + TLD
  this.services = []

  mdns.on('response', this._onresponse)
  mdns.query(this._name, 'PTR')
}