/** Inserts the given child node into the given parent at the given index. */
public void insertNodeInto(MutableTreeNode child, MutableTreeNode parent, int idx) {
parent.insert(child, idx);
fireTreeNodesInserted(this, getPathToRoot(parent), new int[] {idx}, new Object[] {child});
}
private static void addChildrenTo(final MutableTreeNode node, final List<TreeNode> children) {
for (final Object aChildren : children) {
final MutableTreeNode child = (MutableTreeNode) aChildren;
node.insert(child, node.getChildCount());
}
}