private void updateController(@Nullable Configurable configurable) {
    Project project = myTreeView.findConfigurableProject(configurable);
    myBanner.setProjectText(project != null ? getProjectText(project) : null);
    myBanner.setText(myTreeView.getPathNames(configurable));

    if (myLastController != null) {
      myLastController.setBanner(null);
      myLastController = null;
    }

    ConfigurableController controller = ConfigurableController.getOrCreate(configurable, myControllers);
    if (controller != null) {
      myLastController = controller;
      controller.setBanner(myBanner);
    }
  }
private void updateController(@Nullable Configurable configurable)