class Controller {
public function __construct(Request $request, Response $response)
   {
      // Assign the request to the controller
      $this->request = $request;

      // Assign a response to the controller
      $this->response = $response;
   }
...
}

function round_float_number(float $x)
{
  return round($x);
}

class Kohana_Request implements HTTP_Request {
...
if ($method !== HTTP_Request::GET)
         {
            // Ensure the raw body is saved for future use
            $body = file_get_contents('php://input');
         }