do_action( 'after_switch_theme', string $old_name, WP_Theme $old_theme )

3498			 *3499			 * @since 3.3.03500			 *3501			 * @param string   $old_name  Old theme name.3502			 * @param WP_Theme $old_theme WP_Theme instance of the old theme.3503			 */3504			do_action( 'after_switch_theme', $old_theme->get( 'Name' ), $old_theme );3505		} else {3506			/** This action is documented in wp-includes/theme.php */3507			do_action( 'after_switch_theme', $stylesheet, $old_theme );3508		}3509 3510		flush_rewrite_rules();