anchor.diff:     * Event type indicates resource has changed.
      */
     static const EventType CHANGE = const EventType._('CHANGE');
  -
  -  String toString() => name;
   }
   
   /**
  
positive.code: import 'package:logging/logging.dart';
  
  import 'builder.dart';
  import 'jobs.dart';
  import 'preferences.dart';
  import 'utils.dart';
  
negative.code: /**
   * An enum of the valid [ResourceChangeEvent] types.
   */
  class EventType extends Enum<String> {
    const EventType._(String value) : super(value);
  
    /**
     * Event type indicates resource has been added to workspace.
  