*/
private void initTree(TestElement tp) {
// Insert the test plan node
insertNodeInto(new JMeterTreeNode(tp, this), (JMeterTreeNode) getRoot(), 0);
// Insert the workbench node
TestElement wb = new WorkBenchGui().createTestElement();
insertNodeInto(new JMeterTreeNode(wb, this), (JMeterTreeNode) getRoot(), 1);
// Let others know that the tree content has changed.
// This should not be necessary, but without it, nodes are not shown when the user
// uses the Close menu item
nodeStructureChanged((JMeterTreeNode)getRoot());