static JSplitPane setSplitPaneOnFirstShowing(final Component c, final double value) {
  final JSplitPane sp = first(childrenOfType(c, JSplitPane.class));
  if (sp != null)
    onFirstComponentShow(sp, r { 
      print("Setting divider location: Size=" + sp.getSize());
      sp.setDividerLocation(value);
    });
  ret sp;
}