void update(DesignerEditorPanel designer) {
    clearTreeBuilder();
    myComponentTree.newModel();
    if (designer == null) {
      myComponentTree.setDesignerPanel(null);
      myPropertyTablePanel.setArea(null, null);
    }
    else {
      myComponentTree.setDesignerPanel(designer);
      myTreeBuilder = new ComponentTreeBuilder(myComponentTree, designer);
      myPropertyTablePanel.setArea(designer, myTreeBuilder.getTreeArea());
    }
  }
void update(DesignerEditorPanel designer)