code: protected Map session(){
          Map session;
          try{
              SimpleHash sessionHash  = (SimpleHash)get("session");
              session = sessionHash.toMap();
          }catch(Exception e){
              logger().warn("failed to get a session map in context, returning session without data!!!", e);
              session = new HashMap();
          }
          return Collections.unmodifiableMap(session);
      }
docs: Returns reference to a current session map.
  
  @return reference to a current session map.