How to show actions only on success (ajax)

[misner]

On my app, when user sees the modal, he first sees 'loading' while the app gathers something we call the Result.

Then if ajax returns a 'success', I want to show 2 action buttons ('get more details about result') and 'go back to next result')

var msg;
msg = Messenger().run({
  action: $.ajax,
  progressMessage:  'Loading the RESULT...',
  successMessage:  'This is the Result : %{results  and all}',
   actions: {
      getMoreDetails: {
        label: "give me details on the provided result",
        action: function() {
          ....//do stuff
        }
      },
      goToNextResult: {
        label: 'Move To Next Result',
        action: function(){
         //do stuff
        }       
      }
    }
});

The problem today is that the app shows the 2 action buttons ('get more details' and 'move to next result' ) while showing 'loading', that is to say before even showing to the user the result.

Is it possible to tell Hubspot Messenger to only show the actions when the 'success' ajax message appears ?