}
});
}
protected static void setLookAndFeel() {
NimbusLookAndFeel laf = new NimbusLookAndFeel();
try {
UIManager.setLookAndFeel(laf);
} catch (UnsupportedLookAndFeelException e) {
e.printStackTrace(Output.err);
}
UIDefaults nimbUID = laf.getDefaults();
nimbUID.put("Tree.drawHorizontalLines", true);
nimbUID.put("Tree.drawVerticalLines", true);
}