private function createEnv()
{
$env = new \Twig_Environment(new \Twig_Loader_String(), array('cache' => false, 'autoescape' => false, 'optimizations' => 0));
$env->addNodeVisitor(new Paginator());
$env->addFunction(new \Twig_SimpleFunction('paginate', function () {
}));
$env->addFunction(new \Twig_SimpleFunction('render_documents', function () {
}));
$env->addGlobal('collection', range(1, 100));
return $env;
}