Remove unviewable post types from Blocksy customizer

gistfile1.txt

/**
 * Remove unviewable post types from customizer
 */
add_filter(
	'blocksy:custom_post_types:supported_list',
	function ( $post_types ) {
		foreach ( $post_types as $key => $post_type ) {
			if ( ! is_post_type_viewable( $post_type ) ) {
				unset( $post_types[ $key ] );
			}
		}

		return $post_types;
	}
);