code: public String getRenderedContent(final String _script,
                                       final Map<String, String> _uiID2Oid)
          throws EFapsException
      {
          this.executionStatus = UICmdField.ExecutionStatus.RENDER;
          final StringBuilder snip = new StringBuilder();
          final List<Return> returns = executeEvents(_script, _uiID2Oid);
          for (final Return oneReturn : returns) {
              if (oneReturn.contains(ReturnValues.SNIPLETT)) {
                  snip.append(oneReturn.get(ReturnValues.SNIPLETT));
              }
          }
          this.executionStatus = null;
          return snip.toString();
      }
docs: Get the script to render the content for the UserInterface in case that
  not a standard button should be rendered.
  
  @param _script additional script from the UserInterface
  @param _uiID2Oid the ui i d2 oid
  @return html snipplet
  @throws EFapsException on error