Segment::getInstalledSegment

private function getInstalledSegment($code = null)
{
	$filter = array(
		'=IS_SYSTEM' => true,
	);
	if ($code)
	{
		$filter['=CODE'] = $code;
	}
	else
	{
		$filter['CODE'] = 'crm_%';
	}

	$list = Entity\Segment::getList(array(
		'select' => array('ID'),
		'filter' => $filter,
		'limit' => 1
	));
	if ($segment = $list->fetch())
	{
		return $segment['ID'];
	}
	else
	{
		return null;
	}
}