public function update_dropin() {

        global $wp_filesystem;

        WP_Filesystem();

        if ( $wp_filesystem->copy( WP_PLUGIN_DIR . '/redis-cache/includes/object-cache.php', WP_CONTENT_DIR . '/object-cache.php', true  )) {
            WP_CLI::success( __( 'Updated object cache drop-in and enabled Redis object cache.', 'redis-cache' ) );
        } else {
            WP_CLI::error( __( 'Object cache drop-in could not be updated.', 'redis-cache' ) );
        }

    }