How to use the @grafana/runtime.SystemJS function in @grafana/runtime

grafanaUI.DataSourcePlugin = grafanaData.DataSourcePlugin;
grafanaUI.AppPlugin = grafanaData.AppPlugin;
grafanaUI.DataSourceApi = grafanaData.DataSourceApi;

// rxjs
import * as rxjs from 'rxjs';
import * as rxjsOperators from 'rxjs/operators';

// add cache busting
const bust = `?_cache=${Date.now()}`;
function locate(load: { address: string }) {
  return load.address + bust;
}
grafanaRuntime.SystemJS.registry.set('plugin-loader', grafanaRuntime.SystemJS.newModule({ locate: locate }));

grafanaRuntime.SystemJS.config({
  baseURL: 'public',
  defaultExtension: 'js',
  packages: {
    plugins: {
      defaultExtension: 'js',
    },
  },
  map: {
    text: 'vendor/plugin-text/text.js',
    css: 'vendor/plugin-css/css.js',
  },
  meta: {
    '/*': {
      esModule: true,
      authorization: true,
      loader: 'plugin-loader',

export async function importPluginModule(path: string): Promise {
  const builtIn = builtInPlugins[path];
  if (builtIn) {
    // for handling dynamic imports
    if (typeof builtIn === 'function') {
      return await builtIn();
    } else {
      return Promise.resolve(builtIn);
    }
  }
  return grafanaRuntime.SystemJS.import(path);
}

const grafanaUI = grafanaUIraw as any;
grafanaUI.PanelPlugin = grafanaData.PanelPlugin;
grafanaUI.DataSourcePlugin = grafanaData.DataSourcePlugin;
grafanaUI.AppPlugin = grafanaData.AppPlugin;
grafanaUI.DataSourceApi = grafanaData.DataSourceApi;

// rxjs
import * as rxjs from 'rxjs';
import * as rxjsOperators from 'rxjs/operators';

// add cache busting
const bust = `?_cache=${Date.now()}`;
function locate(load: { address: string }) {
  return load.address + bust;
}
grafanaRuntime.SystemJS.registry.set('plugin-loader', grafanaRuntime.SystemJS.newModule({ locate: locate }));

grafanaRuntime.SystemJS.config({
  baseURL: 'public',
  defaultExtension: 'js',
  packages: {
    plugins: {
      defaultExtension: 'js',
    },
  },
  map: {
    text: 'vendor/plugin-text/text.js',
    css: 'vendor/plugin-css/css.js',
  },
  meta: {
    '/*': {
      esModule: true,