anchor.diff:            var reviewer_group_name = this.props.groupIdToName[reviewer_group_id];
             reviewerGroups.push(<div key={reviewer_group_id}>
               <input id={reviewer_group_id}
  -            type='checkbox'
  -            data-reviewer-group-id={reviewer_group_id}
  -            data-reviewee-group-id={reviewee_group_id}
  -            checked={this.checkboxShouldBeChecked(reviewee_group_id, reviewer_group_id)}
  -            onChange={this.reviewerInRevieweeChange}/> {reviewer_group_name}</div>);
  +              type='checkbox'
  +              data-reviewer-group-id={reviewer_group_id}
  +              data-reviewee-group-id={reviewee_group_id}
  +              checked={this.checkboxShouldBeChecked(reviewee_group_id, reviewer_group_id)}
  +              onChange={this.reviewerInRevieweeChange} /> {reviewer_group_name}</div>);
           }.bind(this));
   
  -        var g = {
  +        return {
             id: group.id,
             name: group.name,
             members: reviewerGroups
           };
  -        return g;
         }.bind(this));
   
         return (
  
positive.code:     },
  
      render: function() {
        var skip_empty_submissions = [];
        skip_empty_submissions.push(<input type='checkbox'
            checked={this.state.skip_empty_submissions}
            onChange={this.skipEmptySubmissionsClicked}> <%= j raw t('graders.skip_empty_submissions') %>
          </input>);
  
        return (
          <div>
            <ErrorDiv error={this.state.error} />
  
negative.code:       this.props.onReviewerChangeInRevieweeTable(reviewerGroupId, revieweeGroupId, isChecked);
      },
  
      // Required because of JavaScript's variable hoisting.
      checkboxShouldBeChecked: function(reviewee_group_id, reviewer_group_id) {
        var returnVal = false;
        if (reviewee_group_id in this.props.selectedReviewerInRevieweeGroups) {
          returnVal = reviewer_group_id in this.props.selectedReviewerInRevieweeGroups[reviewee_group_id];
        }
        return returnVal;
      },
  
  