if (getOperationExampleId() != null) {
GroupOperationHistoryCriteria historyCriteria = new GroupOperationHistoryCriteria();
historyCriteria.addFilterId(getOperationExampleId());
historyCriteria.fetchOperationDefinition(true);
historyCriteria.fetchParameters(true);
historyCriteria.setPageControl(PageControl.getSingleRowInstance());
GWTServiceLookup.getOperationService().findGroupOperationHistoriesByCriteria(historyCriteria,
new LoadExampleCallback(latch));
}