svoid onFirstResize(Component c, O r) {
  onFirstResize(c, toRunnable(r));
}

svoid onFirstResize(Component c, Runnable r) {
  if (c != null && r != null) swing {
    c.addComponentListener(new ComponentAdapter {
      public void componentResized(ComponentEvent e) {
        c.removeComponentListener(this);
        pcallF(r);
      }
    });
  }
}

Began life as a copy of #1007285