def METHOD_NAME():
    depth_image_topic = '/camera/depth/image_rect_raw'
    depth_info_topic = '/camera/depth/camera_info'
    print ()
    print ('show_center_depth.py')
    print ('--------------------')
    print ('App to demontrate the usage of the /camera/depth topics.')
    print ()
    print ('Application subscribes to %s and %s topics.' % (depth_image_topic, depth_info_topic))
    print ('Application then calculates and print the range to the closest object.')
    print ('If intrinsics data is available, it also prints the 3D location of the object')
    print ('If a confedence map is also available in the topic %s, it also prints the confidence grade.' % depth_image_topic.replace('depth', 'confidence'))
    print ()
    listener = ImageListener(depth_image_topic, depth_info_topic)
    rclpy.spin(listener)
    listener.destroy_node()
    rclpy.shutdown()    