Deprecated functions in function.php and custom-header.php

I received notice for using deprecated function add_custom_background() in function.php and add_custom_image_header() in custom-header.php

To fix the issue, please replace
add_custom_background() with add_theme_support( ‘custom-background’)
and
add_custom_image_header( ‘sundance_header_style’, ‘sundance_admin_header_style’, ‘sundance_admin_header_image’ );
with
add_theme_support( ‘custom-header’, array(‘sundance_header_style’, ‘sundance_admin_header_style’, ‘sundance_admin_header_image’));

Can you add this is the next version.