/** Removes the given node from its parent. */
public void removeNodeFromParent(MutableTreeNode node) {
MutableTreeNode parent = (MutableTreeNode) node.getParent();
// Ensure that the given node has a parent
if (parent == null) {
throw new IllegalArgumentException("node does not have a parent");
}
// Remove the node from the parent
int idx = parent.getIndex(node);
parent.remove(idx);
// Notify listeners that the node has been removed
fireTreeNodesRemoved(this, getPathToRoot(parent), new int[] {idx}, new Object[] {node});
}
/** 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});
}