View theming

Hi. How do I implement view theming?

Let's say a theme is a folder with templates.

PHP Code:

$theme = 'classic'; // get from some settings
return view($theme .'/users/profile'); 


What can I do to avoid duplicating this prefix in every method of every controller?

use $this property and define in initController(RequestInterface $request, ResponseInterface $response, LoggerInterface $logger)

use $this property and define in initController(RequestInterface $request, ResponseInterface $response, LoggerInterface $logger)

In BaseController class?

use $this property and define in initController(RequestInterface $request, ResponseInterface $response, LoggerInterface $logger)

In BaseController class?

yes