text: const React = require('react');
  const goober = require('goober');
  const autoprefixer = require('goober-autoprefixer');
  
  // Set the pragma for `goober` to know which to use
  goober.setup(React.createElement, autoprefixer.prefix);
  
  // Define a cache entry
  const cache = new Map();
  
  exports.onRenderBody = ({ setHeadComponents, pathname }) => {
      // Add cache support for short-circuiting the processing part
      if (!cache.has(pathname)) {
          cache.set(pathname, goober.extractCss());
      }
  
      // Set the head style component with the extracted css
      setHeadComponents([
          React.createElement('style', {
              id: '_goober',
              key: 'goober',
              dangerouslySetInnerHTML: {
                  __html: ' ' + cache.get(pathname)
              }
          })
      ]);
  };
  