transform js function not working while using select many component with SDP

Summary:

transform js function not working while using select many component with SDP

Content (please ensure you mask any confidential information):

define(['urijs/URI'], function (URI) {
'use strict';

   const addQParam = (url, toAdd) => {
        const query = URI(url).search(true);

        if (query.q) {
            toAdd = Object.assign(JSON.parse(query.q), toAdd);
        }
        query.q = JSON.stringify(toAdd);
        return URI(url).search(query).toString();
      };

    class Request {
         /**
          * @typedef {Object} Configuration
          * @property {Object} fetchConfiguration configuration for the current fetch call
          * @property {Object} endpointDefinition metadata for the endpoint
          * @property {function} readOnlyParameters: Path and query parameters. These are not writable.
          * @property {Object} initConfig map of other configuration passed into the request. The