private boolean parseGroup() {
    PsiBuilder.Marker group = myBuilder.mark();
    addToken();
    boolean b = parseElementContentSpecInner(false);
    if (b && myBuilder.getTokenType() == XML_RIGHT_PAREN) {
      addToken();
      group.done(XML_ELEMENT_CONTENT_GROUP);
      return true;
    }
    if (b) {
      myBuilder.error(XmlPsiBundle.message("dtd.parser.message.rparen.expected"));
      group.done(XML_ELEMENT_CONTENT_GROUP);
      return false;
    }
    group.done(XML_ELEMENT_CONTENT_GROUP);
    return false;
  }
private boolean parseGroup()