Preset::isInstalled

public function isInstalled($xmlId)
{
	$dataDb = Internals\ButtonTable::getList(array(
		'select' => array('ID'),
		'filter' => array('=IS_SYSTEM' => 'Y', '=XML_ID' => $xmlId),
	));
	if($dataDb->fetch())
	{
		return true;
	}
	else
	{
		return false;
	}
}