@NotNull
  static JPanel createPanel(boolean isUseTitledBorder) {
    int verticalGap = TitledSeparator.TOP_INSET;
    JPanel panel = new JPanel(new VerticalFlowLayout(VerticalFlowLayout.TOP, 0, isUseTitledBorder ? 0 : verticalGap, true, true));
    // VerticalFlowLayout incorrectly use vertical gap as top inset
    if (!isUseTitledBorder) {
      panel.setBorder(new EmptyBorder(-verticalGap, 0, 0, 0));
    }
    return panel;
  }
@NotNull
  static JPanel createPanel(boolean isUseTitledBorder)