Manager::checkCanDoOnItem

static function checkCanDoOnItem(array $itemCan, $op)
{
	if(!is_array($itemCan['ACTION']) || empty($itemCan['ACTION']))
	{
		return true; // no rights declaration, then yes
	}

	if(!isset($itemCan['ACTION'][$op]))
	{
		return false; // declaration array is present, but no such operation, then false
	}

	return !!$itemCan['ACTION'][$op];
}