+/**
+ * Get the code language from the given css classes.
+ * @param {String} classes
+ * @return {String}
+ */
+function getLanguageFromCssClasses(classes) {
+ const langClasses = classes.split(' ').filter(cssClass => cssClass.startsWith('language-'));
+ return (langClasses[0] || '').replace('language-', '');
+}
+