EventHandler::getNotVisibleGroupIds

private function getNotVisibleGroupIds($groups): array
{
	[$added, $changed, $removed, $userChanged] = $groups;

	$filter = function($groupId) {
		return ($this->newFields[$groupId]['VISIBLE'] === 'N');
	};
	$changedFilter = function ($groupId) {
		return ($this->newFields[$groupId]['VISIBLE'] === 'N' && $this->oldFields[$groupId]['VISIBLE'] === 'N');
	};
	$removedFilter = function ($groupId) {
		return ($this->oldFields[$groupId]['VISIBLE'] === 'N');
	};

	return array_merge(
		array_filter($added, $filter),
		array_filter($changed, $changedFilter),
		array_filter($removed, $removedFilter),
		array_filter($userChanged, $filter)
	);
}