protected @NotNull JComponent createPopupComponent(JComponent content) {
    JScrollPane scrollPane = createScrollPane(content);
    scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
    scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
    scrollPane.getHorizontalScrollBar().setBorder(null);

    scrollPane.getActionMap().get("unitScrollLeft").setEnabled(false);
    scrollPane.getActionMap().get("unitScrollRight").setEnabled(false);

    scrollPane.setBorder(JBUI.Borders.empty());
    return scrollPane;
  }
protected @NotNull JComponent createPopupComponent(JComponent content)