public void update(GuiEditor designer) {
    clearTreeBuilder();

    myComponentTree.setModel(new DefaultTreeModel(new DefaultMutableTreeNode()));
    myComponentTree.setEditor(designer);
    myPropertyInspector.setEditor(designer);

    if (designer == null) {
      myComponentTree.setFormEditor(null);
    }
    else {
      myComponentTree.setFormEditor(designer.getEditor());
      myComponentTreeBuilder = new ComponentTreeBuilder(myComponentTree, designer);
    }
  }
public void update(GuiEditor designer)