anchor.diff:        if (entity is! Directory) _files.add(entity.path);
       },
           onError: _emitError,
  -        onDone: _readyCompleter.complete,
  +        onDone: () {
  +      if (_runningOnBuildbot) {
  +        print("watcher is ready");
  +      }
  +      _readyCompleter.complete();
  +    },
           cancelOnError: true);
     }
   
  
positive.code:         }
        }
      });
    }
  
    /// Sort all the events in a batch into sets based on their path.
  
negative.code: 
  import 'dart:async';
  import 'dart:io';
  
  import 'package:path/path.dart' as p;
  
  import '../constructable_file_system_event.dart';
  import '../path_set.dart';
  