text: const loaderUtils = require('loader-utils');
  
  const IDENTIFIER = '$_$';
  
  module.exports = function loader(source) {
      const newSource = source.replace(/\${(.+?)}/g, "$${guard(`$1`," + IDENTIFIER + ".$1)}");
      return `const guard = require(${loaderUtils.stringifyRequest(this, require.resolve("./guard.js"))});
      module.exports = (${IDENTIFIER}) => \`${newSource}\`;`;
  };