static JSplitPane jvsplit(Component n, Component s) {
  ret jvsplit(n, s, 0.5);
}

static JSplitPane jvsplit(Component n, Component s, double splitPoint, int delay default 0) {
  ret setSplitPaneOnFirstShowing(
    swingNu(JSplitPane.class, JSplitPane.VERTICAL_SPLIT, wrap(n), wrap(s)),
    splitPoint, delay);
}

static JSplitPane jvsplit(double splitPoint, Component n, Component s) {
  ret jvsplit(n, s, splitPoint);
}