private PackageSet parseParenthesized() throws ParsingException {
      LOG.assertTrue(myLexer.getTokenType() == ScopeTokenTypes.LPARENTH);
      myLexer.advance();

      PackageSet result = parseUnion();
      if (myLexer.getTokenType() != ScopeTokenTypes.RPARENTH) error(CodeInsightBundle.message("error.package.set.rparen.expected"));
      myLexer.advance();

      return result;
    }
private PackageSet parseParenthesized()