How to use the fhir.DSTU1 function in fhir

const fhirCommon = require('./fhir/common')(mongo)
const hooks = require('./fhir/hooks')()
const matchingQueue = require('./matching-queue/matching-queue')(mongo)
const matchingIndexes = require('../scripts/matching-indexes')(mongo)
const moduleLoader = require('./fhir/module-loader')(mongo)
const profileLoader = require('./fhir/profile-loader')()

const acceptedJSONContentTypes = ['application/json+fhir', 'application/fhir+json', 'application/json', 'text/json']
const acceptedXMLContentTypes = ['application/xml+fhir', 'application/fhir+xml', 'application/xml', 'text/xml']

process.title = 'Hearth'

let fhir = null
switch (config.getConf('server:fhirVersion')) {
  case 'dstu1':
    fhir = new FHIR(FHIR.DSTU1)
    break
  case 'dstu2':
    fhir = new FHIR(FHIR.DSTU2)
    break
  case 'stu3':
    fhir = new FHIR(FHIR.STU3)
    break
}

if (config.getConf('createIndexes')) {
  matchingIndexes.createMatchingIndexes((err) => {
    if (err) {
      logger.error(err)
    }
    logger.info('Matching Indexes created')
  })

*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree.
*/

'use strict'

const FHIR = require('fhir')
const config = require('../config')

const profileLoader = require('../fhir/profile-loader')()

let fhir = null
switch (config.getConf('server:fhirVersion')) {
  case 'dstu1':
    fhir = new FHIR(FHIR.DSTU1)
    break
  case 'dstu2':
    fhir = new FHIR(FHIR.DSTU2)
    break
  case 'stu3':
    fhir = new FHIR(FHIR.STU3)
    break
}

module.exports = () => {
  return {
    hooks: {
      before: [
        {
          resourceType: '*',
          interactions: [ 'create', 'update' ],