public PreviewPreset[] getDefaultPresets() {
List<PreviewPreset> presets = new ArrayList<PreviewPreset>();
presets.add(new DefaultPreset());
presets.add(new DefaultCurved());
presets.add(new DefaultStraight());
presets.add(new SmallLabels());
presets.add(new HighlightMutualEdges());
presets.add(new TagCloud());
presets.add(new EdgesCustomColor());
return presets.toArray(new PreviewPreset[0]);
}