How to use the sass.js.style function in sass

async function compile(load) {
    // skip empty files
    if (!load.source || load.source === '') {
      return '';
    }

    // compile module
    const urlBase = `${path.dirname(load.address)}/`;
    let options = {};
    if (pluginOptions.sassOptions) {
      options = Object.assign({}, pluginOptions.sassOptions);
    }
    options.style = compileOpts.minify ? sass.style.compressed : sass.style.expanded;
    options.indentedSyntax = load.address.endsWith('.sass');
    options.importer = { urlBase };
    let { status, text, formatted } = await new Promise(resolve => {  // eslint-disable-line
      sass.compile(load.source, options, resolve);
    });
    if (status !== 0) {
      throw formatted;
    }

    // rewrite urls and copy assets if enabled
    if (pluginOptions.rewriteUrl) {
      const CssUrlRewriterModule = await System.import('css-url-rewriter-ex', __moduleName);
      const CssUrlRewriter = CssUrlRewriterModule.default;
      const urlRewriter = new CssUrlRewriter({ root: System.baseURL });
      text = urlRewriter.rewrite(load.address, text);
      if (pluginOptions.copyAssets) {

'use strict';

var Sass = require('sass.js');
var Q = require('q');
var PATH = require('path');

Sass.options({
	style: Sass.style.expanded
});
module.exports = function (grunt) {
	Sass.importer(function (request, done) {
		if (request.path) {
			done();
		} else if (request.resolved) {
			var realPath = request.resolved.replace(/^\/sass\//, "");
			done(Sass.getPathVariations(realPath).reduce(function (found, path) {
				if (found) {
					return found;
				}
				if (grunt.file.exists(path) && !grunt.file.isDir(path)) {
					return {
						path: request.resolved.substr(0, request.resolved.lastIndexOf('/') + 1) + PATH.basename(path),
						content: grunt.file.read(path)
					};