@Deprecated(forRemoval = true)
  public @NotNull NewErrorTreeViewPanel prepareMessagesView(final @NotNull ProjectSystemId externalSystemId,
                                                            final @NotNull NotificationSource notificationSource,
                                                            boolean activateView) {
    ThreadingAssertions.assertEventDispatchThread();

    final NewErrorTreeViewPanel errorTreeView;
    final String contentDisplayName = getContentDisplayName(notificationSource, externalSystemId);
    final Pair<NotificationSource, ProjectSystemId> contentIdPair = Pair.create(notificationSource, externalSystemId);
    Content targetContent = findContent(contentIdPair, contentDisplayName);

    assert myProject != null;
    final MessageView messageView = MessageView.getInstance(myProject);
    if (targetContent == null || !contentIdPair.equals(targetContent.getUserData(CONTENT_ID_KEY))) {
      errorTreeView = new NewEditableErrorTreeViewPanel(myProject, null, true, true, null);
      targetContent = ContentFactory.getInstance().createContent(errorTreeView, contentDisplayName, true);
      targetContent.putUserData(CONTENT_ID_KEY, contentIdPair);

      messageView.getContentManager().addContent(targetContent);
      Disposer.register(targetContent, errorTreeView);
    }
    else {
      assert targetContent.getComponent() instanceof NewEditableErrorTreeViewPanel;
      errorTreeView = (NewEditableErrorTreeViewPanel)targetContent.getComponent();
    }

    messageView.getContentManager().setSelectedContent(targetContent);
    final ToolWindow tw = ToolWindowManager.getInstance(myProject).getToolWindow(ToolWindowId.MESSAGES_WINDOW);
    if (activateView && tw != null && !tw.isActive()) {
      tw.activate(null, false);
    }
    return errorTreeView;
  }
@Deprecated(forRemoval = true)
  public @NotNull NewErrorTreeViewPanel prepareMessagesView(final @NotNull ProjectSystemId externalSystemId,
                                                            final @NotNull NotificationSource notificationSource,
                                                            boolean activateView)