Quote::isExists

public function isExists($entityID)
{
	if(!is_int($entityID))
	{
		$entityID = (int)$entityID;
	}

	$dbResult = QuoteTable::getList(
		array(
			'select' => array('ID'),
			'filter' => array('=ID' => $entityID)
		)
	);

	return is_array($dbResult->fetch());
}