docs: public void initFormForSession(
          final String sessionId,
          final Element formElement,
          final I_CmsClientCmsUgcSessionCallback onSuccess,
          final I_CmsErrorCallback onError) {
  
          getRpcHelper().executeRpc(SERVICE.getContent(new CmsUUID(sessionId), new AsyncCallback<CmsUgcContent>() {
  
              public void onFailure(Throwable caught) {
  
                  handleError(caught, onError);
              }
  
              public void onSuccess(CmsUgcContent result) {
  
                  CmsClientUgcSession session = new CmsClientUgcSession(CmsXmlContentUgcApi.this, result);
                  session.initFormElement(formElement);
                  onSuccess.call(session);
              }
          }));
      }