GroupMapTable::isExists

static function isExists($fields)
{
	$filter = array();
	foreach ($fields as $name => $value)
		$filter["=".$name] = $value;

	$match = false;
	$list = self::getList(array("filter" => $filter));
	while (($result = $list->fetch()) && !$match)
	{
		$match = true;
		foreach ($fields as $name => $value)
		{
			$match = $match && ($result[$name] === $value);
		}
	}

	return $match;
}