docs: function(done) {
      var isSync = (typeof done !== 'function');
      var sass = require('node-sass');
      var opts = this.sassCSSOptions();
  
      if (isSync) {
        try {
          return sass.renderSync(opts).css.toString();
        } catch (err) {
          throw formatSassError(err, opts.data);
        }
      }
  
      sass.render(opts, function(err, result) {
        if (err) return done(formatSassError(err, opts.data));
        done(null, result.css.toString());
      });
    }