thinner border split HorizontalSplitPanel

In the sampler the border of the split (mainSplit HorizontalSplitPanel) is very thin. Nevertheless in the example SplitPanelBasic the border of the split are wider, as in default. I would like to know how I can set the border of split thinner like the sampler.

See for all the options.

You need to do a setStyleName(Reindeer.SPLITPANEL_SMALL)