code: function getStats(css) {
    postcss()
      .use(cssstats) // TODO: If this doesn't work then use cssstats()
      .process(css)
      .then((result) => {
        result.messages.forEach((message) => {
          console.log(message);
        });
      });
  }
docs: FIXME: Finish this implementation and write a usage guide 
  Generate statistics about input CSS.
  @see https://github.com/cssstats/core
  @param {string} css The CSS to evaluate.