As per the fix for bug#4911502, in GTK L&F the SplitPane should not have one-touch button. So if this is the case then the One-Touch expandable Checkbox option in splitpane demo should be disabled.

Steps to reproduce:
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1) Run SwingSet2 in the PIT build of 13th Sept.
2) Set the L&F to GTK
3) Go to JSplitPane Demo
Notice that the One_Touch expandable checkbox is enabled. And when u click on it does nothing. So its better to disable it in GTK L&F.