static void jDynamicTree_addToNodeAndScroll(final JTree tree, fO node, fO child) {
  swing {
    DefaultMutableTreeNode childNode = jDynamicTree_addToNode(tree, node, child);
    if (childNode == null) ret;
    tree.scrollRectToVisible(tree.getPathBounds(new TreePath(childNode.getPath())));
  }
}