docs: public void perform(TaskRequest req, TaskResponse res) {
  
  		HttpServletResponse sres = (HttpServletResponse) response.evaluate(req, res);
  		String headerName = (String) header_name.evaluate(req, res);
  		String headerValue = (String) header_value.evaluate(req, res);
  		
  		// Send the header
  		sres.addHeader(headerName, headerValue);
  	}