anchor.diff:      new Future(() => responseController.add(response));
     }
   
  -  /**
  -   * Return a future that will complete when a response associated with the
  -   * given [request] has been received. The value of the future will be the
  -   * received response. If [throwOnError] is `true` (the default) then the
  -   * returned future will throw an exception if a server error is reported
  -   * before the response has been received.
  -   *
  -   * Unlike [sendRequest], this method assumes that the [request] has already
  -   * been sent to the server.
  -   */
  +  /// Return a future that will complete when a response associated with the
  +  /// given [request] has been received. The value of the future will be the
  +  /// received response. If [throwOnError] is `true` (the default) then the
  +  /// returned future will throw an exception if a server error is reported
  +  /// before the response has been received.
  +  ///
  +  /// Unlike [sendRequest], this method assumes that the [request] has already
  +  /// been sent to the server.
     Future<Response> waitForResponse(Request request,
         {bool throwOnError = true}) {
       // TODO(brianwilkerson) Attempt to remove the `throwOnError` parameter and
  
positive.code:   }
  }
  
  /**
   * A plugin manager that simulates broadcasting requests to plugins by
   * hard-coding the responses.
   */
  class TestPluginManager implements PluginManager {
    plugin.AnalysisSetPriorityFilesParams analysisSetPriorityFilesParams;
    plugin.AnalysisSetSubscriptionsParams analysisSetSubscriptionsParams;
  
negative.code:     notificationController.add(notification);
    }
  
    /// Send the given [request] to the server and return a future that will
    /// complete when a response associated with the [request] has been received.
    /// The value of the future will be the received response. If [throwOnError] is
    /// `true` (the default) then the returned future will throw an exception if a
    /// server error is reported before the response has been received.
    Future<Response> sendRequest(Request request, {bool throwOnError = true}) {
      // TODO(brianwilkerson) Attempt to remove the `throwOnError` parameter and
      // have the default behavior be the only behavior.
  