libxml.js

assert(this === $container);

assert($container.$importer.container === $container);

this.XML.Document.prototype.print = function print() { print(this.dump()); }

loader.js

var my_global = {};

var importer = new Importer(my_global);

assert(importer.container === my_global);

importer.load('XML')

var doc = my_global.XML.Document();

doc.print();