tag). AMP runtime css (v0.css) will always be inlined as it'll get automatically updated to the * latest version once the AMP runtime has loaded. * * This is ported from the NodeJS optimizer while verifying against the Go version. * * NodeJS: * @version 6f465eb24b05acf74d39541151c17b8d8d97450d * @link https://github.com/ampproject/amp-toolbox/blob/6f465eb24b05acf74d39541151c17b8d8d97450d/packages/optimizer/lib/transformers/AmpBoilerplateTransformer.js * * Go: * @version c9993b8ac4d17d1f05d3a1289956dadf3f9c370a * @link https://github.com/ampproject/amppackager/blob/c9993b8ac4d17d1f05d3a1289956dadf3f9c370a/transformer/transformers/ampruntimecss.go * * @package ampproject/amp-toolbox */ final class AmpRuntimeCss implements Transformer { /** * XPath query to fetch the