Conditionally Force Genesis Framework Layout

/*
** Conditionally force the Genesis Framework Layout on specific post types including Custom Post Types (CPTs)
**
** Instructions: 
** 1) Replace themeprefix with your own prefix
** 2) Keep or replace post types inside array brackets. The example placeholder here is "treatment".
**
** Source: https://wpbeaches.com/force-custom-post-type-certain-layout-genesis-theme-wordpress/
*/

add_filter( 'genesis_site_layout', 'themeprefix_cpt_layout' );

// Force a layout

function themeprefix_cpt_layout() {
    if ( is_singular( array( 'post', 'treatment' ) ) ) {
        return 'content-sidebar';
    }
}