configurePopup(); setLightWeightPopupEnabled(comboBox.isLightWeightPopupEnabled());
installKeyboardActions();
  public BasicComboPopup(JComboBox comboBox)  {    this.comboBox = comboBox;    installComboBoxListeners();    configurePopup();    setLightWeightPopupEnabled(comboBox.isLightWeightPopupEnabled());  }