def METHOD_NAME():
    # Create the GUI (this does NOT start the GUI event loop).
    gui = GUI()
    # Screen size:
    screen_width = gui.system_metrics.screen_width or 1024
    screen_height = gui.system_metrics.screen_height or 768
    # Create and open the main window.
    window = ImagePlotApplicationWindow( title = "Plot" )
    #window.plot_item = object
    window.size = ( 2 * screen_width / 3, 2 * screen_height / 3 )
    window.open()
    # Start the GUI event loop.
    gui.start_event_loop()