title: Manually setting the redirectattributes object
body: <p>I have a POST controller method (say updateRow) that has RedirectAttributes as a parameter, since I am doing a POST to GET redirection after the method is executed. In the redirect GET method, I am accessing the flash attributes using RequestContextUtils.getInputFlashMap(). This works fine.</p>
  
  <p>However, there is a scenario where I need to invoke this POST controller method from within another method. The idea is to pass a RedirectAttributes object that can act as the flash attribute carrier inside the "updateRow" method.</p>
  
  <p>I tried using a new RedirectAttributesModelMap object, which helps in the successful execution of the "updateRow" method, but in the POST-to-GET method, the flash attributes are not available.</p>
  
  <p>Is there a way I can manually define this RedirectAttributesModelMap object and bind it to the request/session?</p>