static JSplitPane setSplitPaneLater(final Component c, final double value) {
  ret setSplitPaneLater(c, value, 0);
}

// value = 0 to 1
static JSplitPane setSplitPaneLater(final Component c, final double value, int delay) {
  final JSplitPane sp = first(childrenOfType(c, JSplitPane.class));
  if (sp != null) {
    Runnable r = r { sp.setDividerLocation(value) };
    if (delay > 0)
      awtLater(sp, delay, r);
    else
      SwingUtilities.invokeLater(r);
  }
  ret sp;
}

Began life as a copy of #1006638