text: const path = require('path');
  
  module.exports = {
  	description: 'replaces missing namespace members with undefined and warns about them',
  	warnings: [
  		{
  			code: 'MISSING_EXPORT',
  			exporter: 'empty.js',
  			importer: 'main.js',
  			id: path.join(__dirname, 'main.js'),
  			missing: 'foo',
  			message: `'foo' is not exported by 'empty.js'`,
  			pos: 61,
  			loc: {
  				file: require('path').resolve(__dirname, 'main.js'),
  				line: 3,
  				column: 25
  			},
  			frame: `
  				1: import * as mod from './empty.js';
  				2:
  				3: assert.equal( typeof mod.foo, 'undefined' );
  				                            ^
  			`,
  			url: `https://rollupjs.org/guide/en/#error-name-is-not-exported-by-module`
  		}
  	]
  };
  