/**
* Initializes object with empty value and parent node.
*
* @param Node $parent The parent node.
*/
public function __construct(Node $parent)
{
parent::__construct($parent);
$this->value = "";
}
/**
* Initializes object with empty child node array and parent node.
*
* @param Node $parent The parent node.
*/
public function __construct(Node $parent = null)
{
parent::__construct($parent);
$this->nodes = array();
}