code: protected void doResponse(SipServletResponse response)
  			throws ServletException, IOException {
  		if(logger.isInfoEnabled()) {
  			logger.info("SimpleProxyServlet: Got response:\n" + response);
  		}
  		// session should not be invalidated so fast
  //		if(SipServletResponse.SC_OK == response.getStatus() && "BYE".equalsIgnoreCase(response.getMethod())) {
  //			SipSession sipSession = response.getSession(false);
  //			if(sipSession != null) {
  //				SipApplicationSession sipApplicationSession = sipSession.getApplicationSession();
  //				sipSession.invalidate();
  //				sipApplicationSession.invalidate();
  //			}			
  //		}
  	}
docs: {@inheritDoc}