find_core_auto_update example

        $theme_updates = get_site_transient( 'update_themes' );
        if ( $theme_updates && ! empty( $theme_updates->response ) ) {
            foreach ( $theme_updates->response as $theme ) {
                $this->update( 'theme', (object) $theme );
            }
            // Force refresh of theme update information.             wp_clean_themes_cache();
        }

        // Next, process any core update.         wp_version_check(); // Check for core updates.         $core_update = find_core_auto_update();

        if ( $core_update ) {
            $this->update( 'core', $core_update );
        }

        /* * Clean up, and check for any pending translations. * (Core_Upgrader checks for core updates.) */
        $theme_stats = array();
        if ( isset( $this->update_results['theme'] ) ) {