public function createGroup(InputStruct $input)
{
$this->logger->logCall(__METHOD__, array('struct' => $input));
$group = $this->persistenceHandler->objectStateHandler()->createGroup($input);
$this->cache->clear('objectstategroup', 'all');
$this->cache->getItem('objectstategroup', $group->id)->set($group)->save();
return $group;
}