private void showContent(@NotNull @NotificationContent String text, @NotNull Color background) {
    String htmlText = text.startsWith("<html>") ? text : UIUtil.toHtml(text);
    myHtmlViewer.setText(htmlText);
    myHtmlViewer.setBackground(background);
    setVisibleEditorPane(true);
    myErrorTitle = null;
    myErrorDescription = null;
  }
private void showContent(@NotNull @NotificationContent String text, @NotNull Color background)