static JSplitPane addToWindowSplitLeft(Component c, Component toAdd) {
  ret addToWindowSplitLeft_f(c, toAdd, func(JComponent c) { jMinWidth_pure(100, c) });
}

static JSplitPane addToWindowSplitLeft(Component c, Component toAdd, double splitRatio) {
  ret setSplitPaneLater(addToWindowSplitLeft(c, toAdd), splitRatio);
}