/** * 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; }