Manager::checkSetPassed

static function checkSetPassed(array $set, $mode)
{
	if($mode == static::MODE_UPDATE)
	{
		return is_array($set); // only is_array(), because empty array is also a legal value
	}
	else
	{
		return is_array($set) && !empty($set); // in "add" mode set should not be empty, or else nothing to do
	}
}