Support for auto-insertion of import lines about postman-to-k6 HOT 7 CLOSED

-$ cat outs.js
// Auto-generated by the postman-to-k6 converter

import "./libs/shim/core.js";
import "./libs/shim/expect.js";
import { group } from "k6";
import * as CryptoJS from "./libs/crypto-js.js"  // imported by me

export let options = { maxRedirects: 4 };


const Pre = Symbol.for("pre");
const Request = Symbol.for("request");
postman[Symbol.for("initial")]({
  options,
  collection: {
    JWT_TOKEN: "",
    APPROVER_TOKEN: "",
    UPLOADER_TOKEN: ""
  },
  environment: {
    host: "10.0.5.49:8081",
    v7: "kmes/v7",
    v6: "kmes/v6",
    jwtIssuer: redacted,
    hmacKey: redacted,
    testUser: "testUser"
  }
});

export default function() {
  postman[Pre].push(() => {

    function make_payload(name) {
      let payload = {
        iss: pm.environment.get("jwtIssuer"),
        iat: Math.floor(Date.now() / 1000),
        exp: Math.floor(Date.now() / 1000 + 100000),
        sub: name
      };
      return payload;
    }

    function base64url(source) {
      let encodedSource = CryptoJS.enc.Base64.stringify(source)
        .replace(/=+$/, "")
        .replace(/\+/g, "-")
        .replace(/\//g, "_");
      return encodedSource;
    }

    function build_token(payload) {
      let hmac_key = pm.environment.get("hmacKey");
      let header = {
        alg: "HS256",
        typ: "JWT"
      };
      let b64_header = base64url(
        CryptoJS.enc.Utf8.parse(JSON.stringify(header))
      );
      let b64_data = base64url(
        CryptoJS.enc.Utf8.parse(JSON.stringify(payload))
      );
      let message = b64_header + "." + b64_data;
      let b64_signature = base64url(CryptoJS.HmacSHA256(message, hmac_key));
      let jwt_token = [b64_header, b64_data, b64_signature].join(".");
      return jwt_token;
    }

    function build_token_from_name(name) {
      let payload = make_payload(name);
      let token = build_token(payload);
      return token;
    }

    let user = pm.environment.get("testUser");
    pm.collectionVariables.set("JWT_TOKEN", build_token_from_name(user));
    pm.collectionVariables.set(
      "APPROVER_TOKEN",
      build_token_from_name("approver")
    );
    pm.collectionVariables.set(
      "UPLOADER_TOKEN",
      build_token_from_name("uploader")
    );
  });

  group("SymmetricKeyGeneration", function() {
    postman[Request]({


      ...