if (editingComponent == null) configureEditingComponent(tree, renderer, realEditor);  if (editingComponent != null && realEditor.isCellEditable(event))
boolean ret = false; boolean ed = false; if (event != null)
  public boolean isCellEditable(EventObject event)  {     if (editingComponent == null)        configureEditingComponent(tree, renderer, realEditor);        if (editingComponent != null && realEditor.isCellEditable(event))      {        prepareForEditing();        return true;      }    return false;  }