anchor.diff:    }
   
     /**
  -   * getAllCommits() is a static function for retrieving a list of all
  -   * commit objects above a branch head. Passing in an optional limit
  -   * variable will return at most that many commit objects.
  +   * A static function for retrieving a list of all commit objects above a
  +   * branch head. Passing in an optional limit variable will return at most
  +   * that many commit objects.
      */
     static Future<List<CommitObject>> getAllCommits(
         ObjectStore store, String branch, {int limit}) {
  
positive.code:   }
  
    /**
     * getNextCommits() is a state based function for successively retrieving
     * a list of commit objects in small chunks.
     */
    Future<List<CommitObject>> getNextCommits() {
      if (_nextHeadShas != null)
  
negative.code: class Log {
    String _branch;
    CommitGraph _graph;
  
    // Integer specifying the number of commits to return with each successive
    // call to getNextCommits.
    int _increment;
  
    List<String> _nextHeadShas;
    ObjectStore _store;
  
    /**
     * Sets up the Log object. Optional [branch] specifies a branch
     * other than the current head. Optional [increment] specifies a number of
     * commits to return with each successive call (defaults to 1).
     */
    Log(this._store, {String branch, int increment: 1}) {
  