The error says "the finction is not defined" occurs but the function is surely defined on the client

What's wrong with this? Why does the NS ignore my client script function?

I'm in the middle of nowhere about the reason, please check my script and tell me why the NS determines that the function is not defined.

The NS says "airisReference is not denied." on the pop-up error display.

define(["N/record"], function (record) {
  /**
   * @NApiVersion 2.1
   * @NScriptType ClientScript
   */
  function pageInit(context) {
  }

  function airisReference() {
    const customFieldPrefix = "custbody";
    const customRecordPrefix = "customrecord";
    const airisMasterId = "_airis";
    const airisMasterField = customFieldPrefix + airisMasterId;
    const airisMasterType = customRecordPrefix + airisMasterId;
    //TBD
    const targetField = ["_gross_vehicle_weight", "_height"];
    const rec = context.currentRecord;
    const airisField = rec.getValue({
      fieldId: