/**
* Constructs an empty BTree with the specified order.
*
* @param integer $m The desired order.
*/
public function __construct($m)
{
parent::__construct($m);
$this->parent = NULL;
}
/**
* Constructs an empty BTree with the specified order.
*
* @param integer $m The desired order.
*/
public function __construct($m)
{
parent::__construct($m);
$this->parent = NULL;
}