$myLevels = $this->user->getAuthorisedViewLevels();
return !in_array(123, $myLevels);
$myLevels = $this->user->getAuthorisedViewLevels();
return in_array(123, $myLevels) || in_array(124, $myLevels);
$myGroups = $this->user->getAuthorisedGroups();