anchor.diff:      int maxResults: 20}) {
       return plusclient.people.list('me', 'visible', orderBy: orderBy,
           maxResults: maxResults).then((PeopleFeed pf) => pf.items);
  +  }
   
  +  void submitScore(ScoreType scoreType, int score) {
  +    scoreBoards
  +    .where((ScoreBoard sb) => sb.scoreType == scoreType)
  +    .forEach((ScoreBoard sb) => sb.submitScore(this, score));
     }
  +
   }
positive.code: part of tilebasedwordsearch;
  
  class Player {
    // Simple Authentication class that takes the token from the Sign-in button
  
negative.code:   // Dart Client Library for the Google+ API
    Plus plusclient;
  
    // Dart Client Library for the Game Play Services API
    Games gamesclient;
  
    // Collection of score boards on Play Services.
    List<ScoreBoard> scoreBoards;
  
    Player() {
      authenticationContext = new SimpleOAuth2(null);
      plusclient = new Plus(authenticationContext);
      gamesclient = new Games(authenticationContext);
      scoreBoards = new List<ScoreBoard>();
    }
  
    void signedIn(SimpleOAuth2 authenticationContext) {
  