WordPress at a glance
function is not described

wp_maybe_auto_update() WP 3.7.0

Performs WordPress automatic background updates.

No Hooks.

Return

Nothing (null).

Usage

wp_maybe_auto_update();

Code of wp maybe auto update: wp-includes/update.php WP 5.2.2

<?php
function wp_maybe_auto_update() {
	include_once( ABSPATH . 'wp-admin/includes/admin.php' );
	include_once( ABSPATH . 'wp-admin/includes/class-wp-upgrader.php' );

	$upgrader = new WP_Automatic_Updater;
	$upgrader->run();
}