private void extendTrialByGuid(TrialInstanceUpdateDto trialInstanceUpdateDto) {
TrialInstance trialInstance = trialInstanceDao.findByGuid(trialInstanceUpdateDto.getGuid());
if (trialInstance == null || !trialInstanceDao.exists(trialInstance.getId())) {
throw new CSWebApplicationException(StringDefs.GENERAL_ERROR_CODE, "GUID does not exist!");
}
extendSingleTrialInstanceExpiration(trialInstance, daysToExtendFromDto(trialInstanceUpdateDto));
trialInstance.setUpdatedAt(trialInstanceUpdateDto.getUpdatedAt());
trialInstanceDao.save(trialInstance);
trialInstanceDao.flush();
}
