@Override
  public boolean cancelTask(@NotNull ExternalSystemTaskId id, @NotNull ExternalSystemTaskNotificationListener listener) {
    for (CancellationTokenSource cancellationTokenSource : myCancellationMap.get(id)) {
      cancellationTokenSource.cancel();
    }
    return true;
  }
@Override
  public boolean cancelTask(@NotNull ExternalSystemTaskId id, @NotNull ExternalSystemTaskNotificationListener listener)