How to use the coap.parameters function in coap

if (!program.args[0]) {
  program.outputHelp()
  process.exit(-1)
}

url = URL.parse(program.args[0])
url.method = method
url.observe = program.observe
url.confirmable = !program.nonConfirmable

if (url.protocol !== 'coap:' || !url.hostname) {
  console.log('Wrong URL. Protocol is not coap or no hostname found.')
  process.exit(-1)
}

coap.parameters.exchangeLifetime = program.timeout ? program.timeout : 30

if (program.block2 && (program.block2 < 1 || program.block2 > 6)) {
  console.log('Invalid block2 size, valid range [1..6]')
  console.log('block2 1: 32 bytes payload, block2 2: 64 bytes payload...')
  process.exit(-1)
}

var startTime = new Date()
req = request(url)
if (program.block2) {
  req.setOption('Block2', Buffer.from([program.block2]))
}

if (typeof program.coapOption !== 'undefined' && program.coapOption.length > 0) {
  program.coapOption.forEach(function (singleOption) {
    var kvPair = singleOption.split(coapOptionSeperator, 2)