code: public void sessionReady(boolean isReady) {
  	if (isReady) {
  	    speedSlider.setValue(session.getClockPeriod());
  	}
  	startAction.setEnabled(isReady);
  	speedSlider.setEnabled(isReady);
  	stepAction.setEnabled(isReady);
  	reloadAction.setEnabled(isReady);
  
      }
docs: Changes the UI depending on whether the session is ready or not
  
  @param isReady true if session was configured correctly; false otherwise