anchor.diff:    this.node.view.eventManager.subscribe('processPostResponseComplete', this.saveSuccessful);
     // MySystem is set by default to save every 20 seconds. If we want to change that frequency, we can call
     // MySystem.setAutoSaveFrequency(20000)
  -};
  +}
   
   /**
    * This function renders everything the student sees when they visit the step.
  
positive.code: 
    this.domIO = document.getElementById('my_system_state');
  
    if (node.studentWork != 'undefined' && node.studentWork != null) {
      this.states = node.studentWork; 
    } 
    else {
  
negative.code: /*globals MYSYSTEM2STATE MySystem eventManager */
  /**
   * This is the constructor for the object that will perform the logic for
   * the step when the students work on it. An instance of this object will
  