private static Border createComplexPopupToolbarBorder() {
    Insets lineInsets = JBUI.CurrentTheme.ComplexPopup.textFieldBorderInsets();
    //noinspection UseDPIAwareBorders
    return JBUI.Borders.compound(new EmptyBorder(0, lineInsets.left, 4, lineInsets.right),
                                 JBUI.Borders.customLineBottom(JBUI.CurrentTheme.CustomFrameDecorations.separatorForeground()),
                                 JBUI.Borders.empty(JBUI.CurrentTheme.ComplexPopup.innerBorderInsets()));
  }
private static Border createComplexPopupToolbarBorder()