code: private Node parseTypeofType(JsDocToken token) {
      Node typeofType = newNode(Token.TYPEOF);
      Node name = parseNameExpression(token);
      skipEOLs();
      typeofType.addChildToFront(name);
      return typeofType;
    }
docs: TypeofType := 'typeof' NameExpression | 'typeof' '(' NameExpression ')'