code: protected void triggerMediaEstablished(PayloadType bestPt) throws NotConnectedException, InterruptedException {
          List<JingleListener> listeners = getListenersList();
          for (JingleListener li : listeners) {
              if (li instanceof JingleMediaListener) {
                  JingleMediaListener mli = (JingleMediaListener) li;
                  mli.mediaEstablished(bestPt);
              }
          }
      }
docs: Trigger a session established event.
  
  @param bestPt
  payload type that has been agreed.
  @throws NotConnectedException
  @throws InterruptedException