anchor.diff:  class ContributorWeekStatistics {
     final GitHub github;
   
  +  /**
  +   * Beginning of the Week
  +   */
     DateTime start;
  +  
  +  /**
  +   * Number of Additions
  +   */
     int additions;
  +  
  +  /**
  +   * Number of Deletions
  +   */
     int deletions;
  +  
  +  /**
  +   * Number of Commits
  +   */
     int commits;
   
     ContributorWeekStatistics(this.github);
  
positive.code:   }
  }
  
  class WeeklyCommitCounts {
    final GitHub github;
    List<int> all;
    List<int> owner;
  
    WeeklyCommitCounts(this.github);
  
negative.code: part of github.client;
  
  /**
   * A Contributor's Statistics for a Repository
   */
  class ContributorStatistics {
    final GitHub github;
  
    /**
     * The Author
     */
    User author;
    
    /**
     * Total Commits
     */
    int total;
    
    /**
     * Weekly Statistics
     */
    List<ContributorWeekStatistics> weeks;
  
    ContributorStatistics(this.github);
  