I want to render controller from my custom class. I know that I should use forward function but I don't know with service I have to use?

I have found something like that 

```
$subRequest = $this->container->get('request')->duplicate(
array(), 
null, 
array('topicId' => $topicId,'_controller' => 'SomeBundle:Topic:close'));

return $this->container->get('http_kernel')
    ->handle($subRequest, HttpKernelInterface::SUB_REQUEST);

```

It's a forward function but if I use it I get headers.

How to hide header from forward function?

I need it because I want to render custom logic ( get from DB and other ). It's my idea for modules.