code: public HttpServletResponse getResponse()
      {
      	// moved as part of 	LIDB-3598 to ServletUtil
      	/*
          ServletResponse r = _resp;
  
          while (!(r instanceof HttpServletResponse))
          {
              if (r instanceof ServletResponseWrapper)
              {
                  r = ((ServletResponseWrapper) r).getResponse();
              }
          }
  			    
          return (HttpServletResponse) r;
          */
      	//begin 311003, 61FVT:Simple SIP request generating exception
      	ServletResponse sRes = null;
  		if (_resp==null)
      		return null;
      	try {
      		sRes = ServletUtil.unwrapResponse(_resp);
      	}
      	catch (RuntimeException re){
      		if (com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled()&&logger.isLoggable (Level.FINE))
      			logger.logp(Level.FINE, CLASS_NAME,"getResponse","Caught RuntimeException unwrapping the response",re);
      		return null;
      	}
      	//end 311003, 61FVT:Simple SIP request generating exception
      	if (sRes instanceof HttpServletResponse)
      		return (HttpServletResponse) sRes;
      	else
      		return null;
      }
docs: Get the response used for the servlet invocation.