@ApiStatus.Internal
  public Usage getNextToSelect(@NotNull Usage toDelete) {
    ThreadingAssertions.assertEventDispatchThread();
    UsageNode usageNode = myUsageNodes.get(toDelete);
    if (usageNode == null || usageNode.getParent().getChildCount() == 0) return null;

    DefaultMutableTreeNode node = myRootPanel.mySupport.findNextNodeAfter(myTree, usageNode, true);
    if (node == null) node = myRootPanel.mySupport.findNextNodeAfter(myTree, usageNode, false); // last node

    return node == null ? null : node.getUserObject() instanceof Usage ? (Usage)node.getUserObject() : null;
  }
@ApiStatus.Internal
  public Usage getNextToSelect(@NotNull Usage toDelete)