code: public static void addModal(JFrame frame, Component component,
  							  ModalListener listener, Integer modalDepth) {
  	addModal_(frame, component, listener, modalDepth);
    }
docs: Add a modal component in the frame.
  
  @param frame
  the frame
  @param component
  the component for modal
  @param listener
  the listener for modal
  @param modalDepth
  the depth for modal