anchor.diff:  import 'git/commands/clone.dart';
   import 'git/commands/commit.dart';
   import 'git/commands/constants.dart';
  +import 'git/commands/diff.dart';
   import 'git/commands/fetch.dart';
   import 'git/commands/index.dart';
   import 'git/commands/pull.dart';
  
positive.code:         // project and fire any necessary resource change events.
          Timer.run(() => project.refresh());
        });
      });
    }
  
  
negative.code:   Future createBranch(String branchName);
  
    Future checkoutBranch(String branchName);
  
    Future diff();
  
    void markResolved(Resource resource);
  
  