/** * Postprocesses the opt:single instruction attribute. * * @internal * @param Opt_Xml_Node $node XML node. * @param Opt_Xml_Attribute $attr XML attribute. */ public function postprocessAttribute(Opt_Xml_Node $node, Opt_Xml_Attribute $attr) { if ($attr->getValue() == 'yes') { $node->set('single', true); $node->removeChildren(); } }