root.addChild(child);
root.addChild(child2);
child2.addChild(child3);
child2.addChild(child5);
child3.addChild(child4);
TreeTableModel model = new ExplainPlanModel(root);
JTreeTable treeTable = new JTreeTable(model);
int rowCount = treeTable.getTree().getRowCount();
for (int i=0;i<rowCount;i++) {
treeTable.getTree().expandRow(i);
}