anchor.diff:  
     this.domIO = document.getElementById('my_system_state');
   
  -  if (node.studentWork != 'undefined' && node.studentWork != null) {
  +  if (node.studentWork != 'undefined' && node.studentWork !== null) {
       this.states = node.studentWork; 
     } 
     else {
  
positive.code:   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.
  
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
  