docs: function () {
      if (/^&attributes\b/.test(this.input)) {
        var consumed = 11;
        this.consume(consumed);
        var tok = this.tok('&attributes');
        this.incrementColumn(consumed);
        var args = this.bracketExpression();
        consumed = args.end + 1;
        this.consume(consumed);
        tok.val = args.src;
        this.tokens.push(tok);
        this.incrementColumn(consumed);
        return true;
      }
    }