public void addChild(
TreeNavigatorNode parent, TreeNavigatorNode child, TreeNavigatorNode previousSibling) {
// int i = parent.getChildCount();
int p = parent.addChild(child, previousSibling);
TreeModelEvent tme =
new TreeModelEvent(this, parent.getTreePath(), new int[] {p}, new Object[] {child});
for (TreeModelListener l : listeners) {
l.treeNodesInserted(tme);
}
}
