/**
* Create a new NullNode.
*
* @param string $name
* Parameter is ignored.
*
* @return NullNode
*/
public static function create($name = 'null')
{
$is_upper = FormatterFactory::getDefaultFormatter()->getConfig('boolean_null_upper');
$node = new NullNode();
$node->addChild(NameNode::create($is_upper ? 'NULL' : 'null'), 'constantName');
return $node;
}
