code: public String buildOptions() {
  
          StringBuffer result = new StringBuffer(128);
  
          result.append("<input type='checkbox' name='");
          result.append(PARAM_READTREE);
          result.append("' value='true' onclick=\"reloadReport();\"");
          if (Boolean.valueOf(getParamReadtree()).booleanValue()) {
              result.append(" checked='checked'");
          }
          result.append(">&nbsp;");
          result.append(key(Messages.GUI_DELETED_RESOURCES_READ_TREE_0));
  
          return result.toString();
      }
docs: Override to display additional options in the dialog.<p>
  
  @return html code to display additional options