code: @Override
  	protected void onBeforeRender() {
  		super.onBeforeRender();
  
  		List<FeedbackMessage> msgs = model.getObject();
  		messages = new HashMap<Component, List<FeedbackMessage>>();
  		
  		for(FeedbackMessage msg : msgs){
  			if(!messages.containsKey(msg.getReporter())) messages.put(msg.getReporter(), new ArrayList<FeedbackMessage>());
  			messages.get(msg.getReporter()).add(msg);
  			msg.markRendered();
  		}
  	}
docs: /* (non-Javadoc)
  @see org.apache.wicket.Component#onBeforeRender()