How to use the jaeger-client.RateLimitingSampler function in jaeger-client

function hemeraOpentracing(hemera, opts, done) {
  if (!opts.serviceName) {
    return done(new Error('serviceName is required'))
  }

  const sampler = new Jaeger.RateLimitingSampler(opts.jaeger.maxTracesPerSecond)
  const reporter = new Jaeger.RemoteReporter(new UDPSender())
  const tracer = new Jaeger.Tracer(opts.serviceName, reporter, sampler, opts)

  hemera.on('serverPreRequest', function(ctx) {
    const span = tracer.startSpan('serverRequest')
    span.log({ event: 'serverPreRequest' })
    span.setTag(Opentracing.Tags.PEER_SERVICE, ctx._topic)
    // span.setTag(Opentracing.Tags.SPAN_KIND_RPC_SERVER)
    // span.setTag(Opentracing.Tags.SPAN_KIND_MESSAGING_CONSUMER)
    ctx._jaegerServerTrace = span
  })

  hemera.on('serverPreResponse', function(ctx) {
    const childSpan = tracer.startSpan('serverRequest', {
      childOf: ctx._jaegerServerTrace
    })

const express = require('express')
const opentracing = require('opentracing')
const jaeger = require('jaeger-client')
const request = require('request-promise-native')

// Using UDP
const UDPSender = require('jaeger-client/dist/src/reporters/udp_sender').default

const app = express()
const port = process.env.PORT || 3003

// Tracer
const udpSender = new UDPSender()
const reporter = new jaeger.RemoteReporter(udpSender)
const sampler = new jaeger.RateLimitingSampler(1)
const tracer = new jaeger.Tracer('service 2', reporter, sampler)

app.get('/site/:site', (req, res) => {
  const spanContext = jaeger.SpanContext.fromString(req.headers['trace-span-context'])
  const span = tracer.startSpan('http_server', {
    childOf: spanContext
  })
  span.setTag(opentracing.Tags.HTTP_URL, `${req.protocol}://${req.hostname}${req.originalUrl}`)
  span.setTag(opentracing.Tags.HTTP_METHOD, req.method)
  span.setTag('request_path', req.route.path)
  span.setTag('request_id', req.headers['x-request-id'])

  const requestOptions = {
    headers: { 'trace-span-context': span.context().toString() },
    json: true
  }

const express = require('express')
const request = require('request-promise-native')
const opentracing = require('opentracing')
const jaeger = require('jaeger-client')

// Using UDP
const UDPSender = require('jaeger-client/dist/src/reporters/udp_sender').default

const app = express()
const port = process.env.PORT || 3002

// Tracer
const udpSender = new UDPSender()
const reporter = new jaeger.RemoteReporter(udpSender)
const sampler = new jaeger.RateLimitingSampler(1)
const tracer = new jaeger.Tracer('service 1', reporter, sampler)

app.get('/', (req, res) => {
  const span = tracer.startSpan('http_server')
  span.setTag(opentracing.Tags.HTTP_URL, `${req.protocol}://${req.hostname}${req.originalUrl}`)
  span.setTag(opentracing.Tags.HTTP_METHOD, req.method)
  span.setTag('request_path', req.route.path)
  span.setTag('request_id', req.headers['x-request-id'])

  const requestOptions = {
    headers: { 'trace-span-context': span.context().toString() },
    json: true
  }

  Promise.all([
    request(Object.assign({ uri: 'http://localhost:3003/site/somkiat' }, requestOptions)),

static create() {
        let jaegerAddress = DynamicConfiguration.getPropertyValue("jaeger");
        if (jaegerAddress) {
            if (!jaegerAddress.startsWith("http://")) {
                jaegerAddress = "http://" + jaegerAddress;
            }
            if (!/:[0-9]+/.test(jaegerAddress)) {
                jaegerAddress = jaegerAddress + ':9411';
            }

            const sender = new UDPSender();
            const tracer = new jaeger.Tracer(Service.fullServiceName,
                new jaeger.RemoteReporter(sender),
                new jaeger.RateLimitingSampler(1));

            return new JaegerInstrumentation(tracer);
        }
        return null;
    }

getSampler(serviceName) {
			if (isFunction(this.settings.sampler))
				return this.settings.sampler;

			if (this.settings.sampler.type == "RateLimiting")
				return new Jaeger.RateLimitingSampler(this.settings.sampler.options.maxTracesPerSecond, this.settings.sampler.options.initBalance);

			if (this.settings.sampler.type == "Probabilistic")
				return new Jaeger.ProbabilisticSampler(this.settings.sampler.options.samplingRate);

			if (this.settings.sampler.type == "GuaranteedThroughput")
				return new GuaranteedThroughputSampler(this.settings.sampler.options.lowerBound, this.settings.sampler.options.samplingRate);

			if (this.settings.sampler.type == "RemoteControlled")
				return new RemoteControlledSampler(serviceName, this.settings.sampler.options);

			return new Jaeger.ConstSampler(this.settings.sampler.options && this.settings.sampler.options.decision != null ? this.settings.sampler.options.decision : 1);
		},